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Water testing is key to a successful aquarium. We have everything you can imagine to make sure you can keep your parameters where they need to be.
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    API Saltwater Master Test Kit

    $49.99
    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...

    Salifert Nitrite (NO2) Test Kit (Reef)

    $16.99
    Nitrite is a substance that is toxic to fish and invertebrates. It is a misconception that once a tank is through its cycle (first 3 or 4 weeks) that nitrite...

    Salifert Nitrate (NO3) Test Kit (Reef)

    $21.99
    When an aquarium has insufficient regions deprived of oxygen (= anaerobic zones) or denitrification proceeds incompletely then nitrate will build-up. A too high nitrate concentration can result in unwanted algae-growth...

    Salifert Ammonia Test Kit (Reef)

    $19.99
    Ammonia and ammonium are substances which should be converted rapidly into nitrite followed by nitrate and nitrogen gas. If this does not happen then the aquarium is not fully cycled...

    Salifert pH Test Kit (Reef)

    $15.99
    The pH value can have a major impact on the growth of corals and calcareous algae and on many biological processes. The pH should not be allowed to fluctuate more...

    API Nitrate Test Kit (NO3)

    $15.99
    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...

    Aquarium Münster Aquavital 5-in-1 Marine Test Strips

    $19.99
    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...

    Seachem MultiTest - Reef Special

    $46.99
    MultiTest™ Reef Special Combines the Phosphate, Silicate, and Iodine/Iodide kits Multi-cavity plate for simultaneous testing of up to 6 tests at the same time Includes reference for test validation Saltwater...

    Seachem MultiTest - Phosphate

    $22.99
    MultiTest™ Nitrite/Nitrate Measures nitrite to less than 0.1 mg/L and nitrate to less than 0.2 mg/L Multi-cavity plate for simultaneous testing of up to 6 tests at the same time...

    Seachem MultiTest - Nitrite & Nitrate

    $22.99
    MultiTest™ Nitrite/Nitrate Measures nitrite to less than 0.1 mg/L and nitrate to less than 0.2 mg/L Multi-cavity plate for simultaneous testing of up to 6 tests at the same time...

    Seachem MultiTest - Marine pH & Alkalinity

    $19.99
    MultiTest™ Marine pH & Alkalinity Unique dye that has a pronounced color change between 8.0 and 8.3 Multi-cavity plate for simultaneous testing of up to 6 tests at the same...

    Seachem MultiTest - Marine Basic

    $46.99
    MultiTest™ Marine Basic Combines the Marine pH & Alkalinity, Ammonia, and Nitrite & Nitrate kits Multi-cavity plate for simultaneous testing of up to 6 tests at the same time Includes...

    Seachem MultiTest - Iodine & Iodide

    $14.69
    MultiTest™ Iodine & Iodide Catalysis based, sensitive to less than 0.0025 mg/L Multi-cavity plate for simultaneous testing of up to 6 tests at the same time Includes reference for test...

    Seachem MultiTest - Copper

    $19.99
    MultiTest™ Copper Measures all types of copper to less than 0.01 mg/L Multi-cavity plate for simultaneous testing of up to 6 tests at the same time Includes reference for test...

    Seachem MultiTest - Ammonia

    $19.99
    MultiTest™ Ammonia Measures total and free ammonia down to less than 0.05 mg/L Multi-cavity plate for simultaneous testing of up to 6 tests at the same time Includes reference for...

    Salifert Calcium Test Kit (Reef)

    $24.99
    Calcium is a major constituent of calcareous algae, skeletal material of hard corals and the skeletal needles of soft/leather corals. Calcium also fulfills many biological functions. Quite often a too...

    Salifert Phosphate Test Kit (Reef)

    $24.99
    Phosphate has several negative effects if present in a too high concentration. First of all undesirable algae growth might result. Making an aquarium an unpleasant sight. Phosphate also blocks or...

    Salifert Alkalinity Test Kit (Reef)

    $18.99
    Calcium alone cannot form the skeletal material of corals and allow calcareous algae to grow. Some other substances are needed as well. A few other constituents are carbonate and bicarbonate....

    Salifert Magnesium Test Kit (Reef)

    $26.99
    Magnesium is present in NSW in a fairly high concentration (1300 - 1400 mg/L). Magnesium is an essential part of chlorophyll, which is necessary for photosynthesis. Without photosynthesis plants, including...

    Salifert Silicate Test Kit (Reef)

    $16.21
    Silicate occurs especially in tap water or in purified water when the RO or DI unit is not functioning properly. Silicate not only results in diatom bloom but might also...

    Salifert Strontium Test Kit (Reef)

    $33.18
    Strontium plays an important role by accelerating coral and calcareous algae growth.NSW contains approx. 7 – 9 mg/L strontium.Since the growth of corals and calcareous algae goes hand in hand...

    Salifert Oxygen Test Kit (Reef)

    $19.99
    Oxygen is highly essential for all life forms. Especially corals and marine fish require oxygen concentrations at saturation level. This is because of the low solubility of oxygen in saline...

    Salifert Iodine Test Kit (Reef)

    $29.30
    Iodine is present in NSW (Natural seawater) in a very low concentration (0.06 mg/L or 0.06 ppm).Iodine occurs as different species. Some of them are iodide, iodate and hypoiodite.Generally when...

    Salifert Copper Test Kit (Reef)

    $18.99
    Copper is often used as a treatment for parasite infested fish and it is essential that the correct concentration is used as too high levels can be toxic to marine...

    Salifert Flatworm eXit Test Kit (Reef)

    $22.99
    Flatworm eXit itself is quite safe to fish and invertebrates.However, the body fluids of flatworms can be toxic to some reef inhabitants when present in a too high concentration. This body fluid is sometimes...

    Salifert Organics Test Kit (Reef)

    $25.99
    The Organics test kit will give an impression of the pollution of water caused by many phenols and many other types of organic compounds. Some of them are hard to...

    Red Sea Pro Reef Test Kit: KH/Alkalinity

    $34.99
    Advanced titration test measuring the level of buffers in your reef aquarium, with exceptionally high accuracy of 0.05 meq/l (0.14 dKH) Red Sea’s KH\ALKALINITY PROReef Test Kit is an advanced...

    Red Sea Pro Reef Test Kit: Calcium

    $38.99
    CALCIUM PRO REEF TEST KIT Advanced titration test measuring the level of calcium in your reef aquarium, with exceptionally high accuracy of 5 ppm Red Sea’s CALCIUM PRO Reef Test...

    Red Sea Pro Reef Test Kit: Magnesium

    $38.99
    MAGNESIUM PRO REEF TEST KIT Advanced titration test measuring the level of Magnesium in your reef aquarium, with exceptionally high accuracy of 20 ppm Red Sea’s MAGNESIUM PRO Reef Test...

    Red Sea Pro Reef Test Kit: Phosphate

    $47.99
    Advanced colorimetric test with comparator, measuring the level of Phosphate in your reef aquarium, with exceptionally high accuracy of 0.02ppm PO4 Red Sea’s Phosphate Pro Reef Test Kit is an...

    Red Sea Pro Reef Test Kit: Nitrate

    $38.99
    Advanced colorimetric test with comparator, measuring the level of Nitrate in your reef aquarium, with exceptionally high accuracy of 0.12ppm NO3 Red Sea’s Nitrate Pro Reef Test Kit is an...

    Red Sea Pro Reef Test Kit: Algae Control

    $59.99
    High accuracy colorimetric comparator tests for the exceptionally high accuracy measurement of Nitrate and Phosphate. For all Reef Systems. Best Value Red Sea’s Algae Control Pro Multi Test Kit includes high...

    Red Sea Reef Foundation Pro Test Kit: Reef Foundation

    $65.99
    High accuracy titration tests for the accurate measurement of the Foundation elements Calcium, Magnesium and Alkalinity (KH). Best Value Red Sea’s FOUNDATION PRO Multi Test Kit includes high accuracy titration tests...

    API Freshwater Master Test Kit

    $49.99
    The API® Freshwater Master Test Kit measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range pH, ammonia, nitrite, and nitrate. With scientific accuracy for...

    API Reef Master Test Kit

    $56.99
    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...

    API pH Test Kit

    $9.99
    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...

    API High Range pH Test Kit

    $10.99
    The API® High Range pH Test Kit measures pH changes in marine aquariums, aquariums with African Cichlids, and very alkaline tap water. The API® High Range pH Test Kit reads the pH...

    API Ammonia Test Kit

    $21.99
    The API® Ammonia Test Kit measures ammonia to help prevent fish loss, as ammonia is the number one stressor and killer of tropical fish. Ammonia is released into an aquarium in...

    API Nitrite Test Kit (NO2)

    $15.99
    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...

    API Calcium Test Kit

    $15.99
    Calcium is one of the most important elements in a reef aquarium. Reef invertebrates, such as corals, crustaceans, mollusks, and even some type of encrusting algae, need calcium to grow...

    API Copper Test Kit

    $16.99
    Copper – a treatment for many parasitic infections – must be monitored in an aquarium or a pond. The copper level can drop too low for the treatment to be...

    API Phosphate Test Kit

    $18.99
    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,...

    API KH Carbonate Hardness Test Kit

    $11.99
    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...

    API GH & KH Test Kit

    $13.99
    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...

    API 5-in-1 Aquarium Test Kit Strips

    $21.99
    API® 5-in-1 Aquarium Test Strips are the quick and easy way to test the 5 most important water parameters – pH, KH, GH, nitrate, and nitrite – in one easy step....
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