When keeping freshwater fish and plants, the general hardness (GH) and carbonate hardness (KH) of aquarium water should match their natural habitat. The API® GH & KH Test Kit helps you duplicate the natural habitat of your fish to prevent stress, keeping them healthy! The kit includes 2 bottles of liquid reagent, 2 glass test tubes with snap-tight caps, and step-by-step instructions. We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Includes 2 test bottles, easy-to-ready instructions, and glass test tubes
The API® KH Carbonate Hardness Test Kit tests fresh or saltwater aquariums for carbonate hardness (KH), and helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants. Carbonate hardness stabilizes aquarium pH, and can be used to determine the proper dose of pH buffers. We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Includes 1 test bottle, easy-to-ready instructions, glass test tube and color chart
API® Melafix is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wounds and abrasions, tail rot, eye cloud, and mouth fungus. API Melafix also promotes regrowth of damaged fins and tissue. Product may be used when adding fish to an aquarium – particularly to smooth the transition from store to home – and if an infection is suspected, but not yet diagnosed. Some fish bought in pet stores are already carrying diseases at the time of purchase, which may be difficult to detect in its early stages.API Melafix will not adversely affect the biological filter, alter the pH, or discolor water. It is safe for use in freshwater, saltwater, and reef aquariums, and in aquariums with live plants. Dose for the recommended amount of time as directed on label, and in accordance with the size of your aquarium.
DIRECTIONS FOR USE:
Add 5 ml per 10 gallons of aquarium water. Dose daily for 7 days. After 7 days, make a 25% water change.
SIZES:
4 oz.8 oz.16 oz.
WARNING: This product can expose you to chemicals including beta-Myrcene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
High nitrate levels in your aquarium indicate a build-up of fish waste and organic compounds, resulting in poor water quality and an increase in algae growth. Contrarily, maintaining a low nitrate level improves the health of fish and invertebrates. Use the API® Nitrate Test Kit to ensure that the nitrate levels in your tank are safe and healthy for your fish. The Nitrate Test Kit reads parameters from 0 to 160 ppm, and contains 2 bottles of liquid test reagent, 2 color cards for easy comparison, 1 glass test tube with a snap-tight cap, and step-by-step instructions on how to correct unsafe conditions. It may be used for both fresh and saltwater aquariums. We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Contains 90 tests and includes 2 test solutions, easy-to-ready instructions, glass test tube and color chart
Nitrite is produced in the aquarium in the forms of fish waste, uneaten food, and by nitrifying bacteria in your aquarium’s natural cycle as it breaks down ammonia. Low levels of nitrite inhibit respiration and suppress the immune system, while high levels cause suffocation in fish. The API® Nitrite Test Kit reads nitrite levels quickly and accurately in your tank, and tests parameters from 0 to 5 ppm. With the Nitrite Test Kit, you can be sure that nitrite levels in your aquarium are always safe for your fish!
We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Contains 180 tests and includes 1 test solution, easy-to-ready instructions, glass test tube and color chart
The API® pH Test Kit monitors pH to maintain healthy freshwater conditions in your tank. pH control is imperative to prevent the harmful effects of overly alkaline or acidic aquarium water on fish and plant life, so take a few minutes each week to maintain and monitor your pH conditions with this easy-to-use kit! Tests read pH from 6.0 – 7.6, and will help you quickly and easily determine whether your levels are too high or too low.
We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Contains 250 tests and includes 1 test bottle, easy-to-ready instructions, glass test tube and color chart
Phosphate can enter your aquarium through tap water, fish waste, and decaying organics such as uneaten food and dead algae. Excess phosphate contributes to unsightly algae and green water blooms, and in saltwater, excess phosphate can inhibit the growth of hard corals. The API® Phosphate Test Kit tests phosphate levels from 0 to 10 ppm so that you can easily monitor the condition of your aquarium water. May be used in both fresh and saltwater aquariums. We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Contains 150 tests and includes 2 test solutions, easy-to-ready instructions, glass test tube and 2 color charts
API® Pimafix is an all-natural, antifungal remedy for fish fungal infections, with a formula derived from the West Indian Bay Tree – a proven natural antifungal. API Pimafix rapidly treats cottony growth, mouth, body fungus, and the reddening of the fins and body, in addition to both internal and external bacterial infections. API Pimafix will not adversely affect the biological filter, alter pH, or discolor water, and has been formulated to use in conjunction with Melafix to enhance effectiveness against fish diseases.
DIRECTIONS FOR USE:
Add 5 ml per 10 gallons of aquarium water. Dose daily for 7 days. After 7 days, make a 25% water change.
SIZES:
4 oz.8 oz.16 oz.
WARNING: This product can expose you to chemicals including beta-Myrcene, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
The API® Reef Master Test Kit test 4 key parameters – calcium, carbonate hardness, phosphate, and nitrate – to keep reef inhabitants healthy. Testing is fast, easy, and accurate, yielding precise results, and comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy, reusable storage. This kit also includes a complete, step-by-step instructional booklet with a color chart that provides information on how to correct unsafe water conditions.We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Includes 7 test solutions, easy-to-ready instructions, glass test tubes and color chart
Note: Packaging may vary. The test kits are the same, but API has updated their packaging. We still have some of the old packaging kits and those will be shipped first.
The API® Saltwater Master Test Kit measures the 4 most important saltwater parameters – pH, ammonia, nitrite, and nitrate – to enable easy testing of your tank’s natural cycle, and to aid in maintaining a thriving saltwater aquarium. Testing is fast, easy, and accurate, yielding precise results, and comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy storage. This kit also includes a complete, step-by-step instructional booklet with a color chart that provides information on how to correct unsafe water conditions. Each Saltwater Master Test Kit will conduct 550+ tests, so you can get the most out of your kit for years of fast, accurate water testing.
We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
SIZE:
Contains 550 tests and includes 6 test solutions, easy-to-ready instructions, glass test tubes and color chart
Note: Packaging may vary. The test kits are the same, but API has updated their packaging. We still have some of the old packaging kits and those will be shipped first.
This hobby is full of people who love to build their own sumps and make their own equipment. That's just the fun part of this hobby. Help them out by offering one of our Add-a-Sock kits! These kits are made from durable ABS plastic and cell cast acrylic and come in a variety of sizes and inlet / sock options. These are cut to size and easy to install into almost any aquarium or box that holds water. Such an easy way to add particulate filtration to any existing system! Just super glue or silicone in place with a glass tank, or if it's already an acrylic sump just use Weldon!
The 4" corner kit comes with the sock holder, hose connector and one single 7" 200 micron filter sock.
This hobby is full of people who love to build their own sumps and make their own equipment. That's just the fun part of this hobby. Help them out by offering one of our Add-a-Sock kits! These kits are made from durable ABS plastic and cell cast acrylic and come in a variety of sizes and inlet / sock options. These are cut to size and easy to install into almost any aquarium or box that holds water. Such an easy way to add particulate filtration to any existing system! Just super glue or silicone in place with a glass tank, or if it's already an acrylic sump just use Weldon!
The 7" single kit comes with the sock holder, hose connector(s) and one 7" 200 micron filter sock. The 7" lid is designed to fit most 12" wide tanks and can be customized with one or two hose inlets (to go into the single sock). Inlet size is 1" by default. A 1.5" or 2.0" bulkhead can be substituted, but there's room enough for only one of those vs. two 1.0".
The Best Algae Clip You Will Ever Own!
Our wonderful hobby is filled with all kind of creatures that love greens. Herbivores love eating seaweed, lettuces, cucumbers, zucchini and other leafy foods, and there’s no easy way to really feed them… until now.
You may have some form of an algae clip… maybe one that suction cups inside the aquarium, or maybe one that uses a magnet but either way you have to dive in elbow-deep to retrieve the clip when the food is gone. Not any more! We took a simple algae clip and made it better by making a polycarbonate hanger for it! No more getting wet and making messes. Just put your seaweed or vegetables in our clip and hang the clip on the side of your aquarium. When the food is gone and the fish are done eating, simply pull it back out and never get your hand in the aquarium water!
This clip is the best clip you’ll ever own. It’s perfect for Saltwater and Reef tanks that are home to any type of Tang or other grazers. But the most surprising use of this clip we have seen is for freshwater! Tropheus and Plecos LOVE greens, and Plecos like to munch on Zucchini. Tired of blanching the Zucchini? You don’t have to any more. Just clip it and stick it in the tank. Clean, Fast, Easy, Simple.
These come in four sizes. Size is determined by the distance from the top of the clip where it hangs on the tank to the bottom of the clip.
Small Clips are 5″ to 6″ overall length
Medium Clips are 8″ to 10″ overall length
Large Clips are 12″ to 14″ overall length
X-Large Clips are 18″ – 22″ overall length
The different lengths allow use for all size aquariums, from Nano tanks to 500+ gallon tanks. The clips are bent and have a gap to fit over the frames of glass aquariums and depending on the manufacturer, can fit over the edge of most acrylic aquariums, too.
If you have a Reef Aquarium, chances are it’s got an overflow box and a sump. The most common overflows are found in Marineland and Perfecto aquariums, and this is a quarter circle Cornerflo overflow box. These work great, but have their flaws. We fix those flaws with our Cornerflo Covers. You simply take our Cornerflo Cover and slide it into place over the Cornerflo box! Now, depending on who made the tank and which production run it was, there are two ways (see pictures!) that these will fit. They will either fit underneath the black trim and over top of the Cornerflo (the best way) or you will have to put them on top of the black trim, leaving a small gap which is not good if you have lids for the tank. It may fit on top if it won’t slide into the corner, just not as exact as it’s designed to. We have tested on many tanks and found that it fits the way it should fit about 8/10 times, the difference being where the manufacturer ran the silicone holding the box in.
So, the advantages…
Simple to install – even use a dab of Super Glue for a stronger installation
CNC Routed out of ABS Plastic for a strong, long lasting product
Keeps light out – no more algae building up in the overflow box!
Keeps critters out! Ever had a large snail clog up an intake?
Keeps the noise down. No matter what, you’ll hear a water trickle, but this minimizes it
Keeps fish out. I had my Christmas Wrasse jump in mine… tear a tank down just to get a fish out? Never again!
If you put the large cover on a small box, it shades the intake grates preventing most algae growth on the intake grates
Made in the USA!
This hobby is full of people who love to build their own sumps and make their own equipment. That's just the fun part of this hobby. Help them out by offering one of our Add-a-Sock kits! These kits are made from durable ABS plastic and cell cast acrylic and come in a variety of sizes and inlet / sock options. These are cut to size and easy to install into almost any aquarium or box that holds water. Such an easy way to add particulate filtration to any existing system! Just super glue or silicone in place with a glass tank, or if it's already an acrylic sump just use Weldon!
The Dual 7" kit is where we get into some heavy customization options! We designed these to fit most stock 40 breeder aquariums, rim to rim. Since all 40BR are slightly different, this may fit perfect, or it may need just a slight shave. That being said, here are the ways we can customize it.
The filter lid has two 7" filter socks. The inlets can be customized to about any configuration you want. By default, there is a single 1" inlet per sock. We can have two 1" inlets per sock, one or two 1.5" inlets per sock, one 2.0" inlet per sock or we can leave the top of the lid un-drilled and you can add whatever you'd like instead.
Filter socks are the most convenient form of mechanical filtration for ones aquarium. Filter socks remove excess food, detritus, organic waste, dust and other particulates from your water. Removing these particulates will reduce the amount of organic matter that produces ammonia and other undesirable substances in your aquarium. Our filter socks are made in the USA and are made to last a long time with proper care.
All of our plastic fish and cricket bags are manufactured in the USA from 100% recycled plastic. These bags feature super strong construction with the 6" and 8" bags having a 'folded' bottom - which means no seam on the bottom, resulting in one less thing you have to worry about. Our bags are guaranteed to not leak at any of the seams.
Sold in boxes of 500. Quantity ordered of '1' equals 500 bags, or 1 box.
Aqua-Crylic carries Black Polystyrene Egg Crate Material in sheets! We have the best price available and will even custom cut to size for a nominal fee. Available in black and white. Sheets are 3/8" thick by 23 5/8" x 47 5/8".
Quantity price brakes are available and as follows:
15 sheets are in a case
Blade Freshwater
Balanced White Spectrum for Planted Aquariums
The Blade Freshwater delivers a clean, highly tunable spectrum designed to support healthy plant growth and enhance the vivid colors of freshwater fish. With EdgeField™ optics, it produces smooth color mixing, wide 95° spread, and natural shimmer with minimal shadowing. Available in seven lengths, the Blade Freshwater can serve as a primary light source or as supplemental fill lighting in your planted aquarium.
Key Features:
Balanced white spectrum with tunable Kelvin range
Ample red, blue, and green output for plant growth and coloration
EdgeField™ optics for even PAR and smooth blending
IP66 water-resistant with passive, silent cooling
MyAI® and Mobius app control + MXM Apex Fusion compatibility
Available in 7 sizes (12–66") with multiple mounting options
Coverage & Specs:
Fixture Lengths: 12.1", 21.1", 30.1", 39.1", 48.1", 57.1", 66.1"
Dimensions: 2.8" W x 0.7" H
LEDs per Cluster: 16x Cool White, 4x Warm White, 2x Red, 2x Blue
Power: 20–140W (model dependent)
Input: 100–240V AC, 50–60Hz
Cable Length: 9.8' (3m)
Compliance: UL, CE, RoHS
Water Resistance: IP66 rated
What’s Included:
1x AI Blade Freshwater LED Fixture
1x Power Adapter
1x Tank Rest (fixtures up to 39") or 2x Mounting Clips (fixtures over 39")
The Blade Freshwater combines spectrum flexibility, smart control, and efficient design—delivering reliable lighting performance for planted aquariums.
Blade Refugium
Optimized Spectrum for Macroalgae Growth
The Blade Refugium is purpose-built to fuel macroalgae growth in saltwater sumps and refugiums. Its horticultural spectrum of red, blue, and white output supports efficient nutrient uptake while AI’s EdgeField™ optics deliver smooth color mixing, wide spread, and minimal shadowing. Compact, water-resistant, and passively cooled, the Blade Refugium is an effective solution for boosting biological filtration.
Key Features:
Spectrum tailored for macroalgae growth
EdgeField™ optics for wide 95° spread and smooth blending
Compact, IP66-rated housing with passive, silent cooling
MyAI® and Mobius app control + MXM Apex Fusion compatibility
Multiple mounting options included or available separately
Coverage & Specs:
Dimensions: 12.1" L x 2.8" W x 0.7" H
LEDs per Cluster: 6x Royal Blue, 6x 430nm, 6x Red, 6x Cool White
Power: 20W max draw
Input: 100–240V AC, 50–60Hz
Cable Length: 9.8' (3m)
Compliance: UL, CE, RoHS
Water Resistance: IP66 rated
What’s Included:
1x AI Blade Refugium LED Fixture (12")
1x Power Adapter
1x Tank Rest Mount
The Blade Refugium combines optimized spectrum and efficient design to deliver rapid macroalgae growth—helping your refugium work harder at nutrient export.
You may also like
Blade Coral Grow
Balanced Spectrum for Coral Growth
The Blade Coral Grow delivers a powerful blue and white spectrum tailored to maximize coral photosynthesis and growth. With AI’s EdgeField™ optics, it provides smooth color mixing, wide 95° spread, and natural shimmer while minimizing shadowing. Available in seven lengths, the Coral Grow can serve as a primary light source or pair seamlessly with Blade Coral Glow for balanced growth and fluorescence.
Key Features:
Optimized spectrum for coral photosynthesis (400–500nm)
EdgeField™ optics for even PAR and smooth blending
Minimal shadowing and natural shimmer
Available in 7 sizes (12–66") for versatile setups
IP66 water-resistant with passive, silent cooling
MyAI® and Mobius app control + MXM Apex Fusion compatibility
Multiple mounting options included or available separately
Coverage & Specs:
Fixture Lengths: 12.1", 21.1", 30.1", 39.1", 48.1", 57.1", 66.1"
Dimensions: 2.8" W x 0.7" H
LEDs per Cluster: 12x Royal Blue, 6x Cool White, 6x Blue
Power: 20–140W (model dependent)
Input: 100–240V AC, 50–60Hz
Cable Length: 9.8' (3m)
Compliance: UL, CE, RoHS
Water Resistance: IP66 rated
What’s Included:
1x AI Blade Coral Grow LED Fixture
1x Power Adapter
1x Tank Rest (fixtures up to 39") or 2x Mounting Clips (fixtures over 39")
The Blade Coral Grow provides strong, balanced spectrum output for coral health and growth—perfect alone or combined with Coral Glow for a complete reef lighting solution.
AI Orbit 2 Pump
Cross-Flow Power for Realistic Ocean Currents
The AI Orbit 2 creates a unique circular flow pattern, simulating the tidal currents found on natural reefs. By moving water across the entire length of the aquarium, it helps lift excess nutrients and detritus from the bottom for removal by filtration. Compact, quiet, and fully controllable, the Orbit 2 is an ideal cross-flow solution for tanks 20 gallons and larger.
Pairing Orbit pumps with the directional, random flow of Nero powerheads creates a dynamic mix of currents that closely replicates the diverse motion of the ocean—systematic, chaotic, and powerful.
Key Features:
Versatile cross-flow pump design for tidal-style circulation
Smart control via MyAI® app, Mobius®, or MXM Apex Fusion
Four pump modes: Constant, Pulse, Random, Reverse
Reversible flow for flexible current patterns
Ultra-quiet, energy-efficient DC motor
Ideal for aquariums 20–88+ gallons
Magnetic mounting system for easy positioning
Coverage & Specs:
Dimensions: 8.78" W x 1.5" D x 2.83" H
Max Glass Thickness: 0.59" (15mm)
Power Consumption: up to 25W
Recommended Tank Size: 20–88+ gallons
Input: 100–240VAC, 50–60Hz, 2A
What’s Included:
1x AI Orbit 2 Pump with Integrated Driver
1x Mounting Magnet
1x Power Adapter with Universal Plug Adapter Set
1x Quick Start Guide
The Orbit 2 delivers efficient, customizable cross-flow—bringing your reef tank one step closer to the dynamic currents of the ocean.
AI Orbit 4 Pump
Powerful Cross-Flow for Larger Aquariums
The AI Orbit 4 delivers strong, consistent cross-flow circulation, simulating the tidal currents that reefs depend on in nature. Its wide, reversible flow keeps detritus suspended for filtration and ensures even water movement throughout your tank. Designed for aquariums 20 gallons and larger, the Orbit 4 is compact, quiet, and fully controllable for a truly dynamic flow experience.
For the most natural results, pair Orbit pumps with the directional, random flow of Nero powerheads to recreate the diverse water motion of ocean reefs—systematic, chaotic, and powerful.
Key Features:
Versatile cross-flow pump for reef-style circulation
Smart control via MyAI® app, Mobius®, or MXM Apex Fusion
Four pump modes: Constant, Pulse, Random, Reverse
Reversible flow for flexible current options
Ultra-quiet, energy-efficient DC motor
Ideal for aquariums 20–120+ gallons
Strong magnetic mounting system for easy installation
Coverage & Specs:
Dimensions: 12.1" W x 1.69" D x 3.15" H
Max Glass Thickness: 0.79" (20mm)
Power Consumption: up to 45W
Recommended Tank Size: 20–120+ gallons
Input: 100–240VAC, 50–60Hz, 2A
What’s Included:
1x AI Orbit 4 Pump with Integrated Driver
1x Mounting Magnet
1x Power Adapter with Universal Plug Adapter Set
1x Quick Start Guide
The Orbit 4 provides wide, customizable flow that mimics ocean currents—perfect for medium to large aquariums.
You may also like
For many years the well-known AQUAVITAL MULTITEST 6in1 has been sold for fresh water aquariums. Now Aquarium Münster is introducing a new quick test for marine aquariums.
The AQUAVITAL MARINE-TEST 5in1 allows you to quickly, easily and reliably determine 5 of the most important parameters for marine water: pH, carbonate hardness (KH), nitrite (NO2), nitrate (NO3) and calcium (Ca).
Even inexperienced aquarists can quickly obtain a reliable water analysis with the AQUAVITAL MARINE-TEST 5in1. Simply dip the test strip into the water for one second, then shake off the excess water. After waiting for about one minute, compare the color fields on the test strip with the provided color scales on the container.
