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Automatically sets and stabilizes pH at 7.5. Removes chlorine and detoxifies heavy metals. Contains electrolytes to reduce fish stress. Use when se...

Automatically sets and stabilizes pH at 8.2. For saltwater, brackish and African cichlid aquariums. Use when setting up aquarium or changing water....

API® QUICK START nitrifying bacteria allows for the instant addition of fish, as it immediately starts the natural aquarium cycle with beneficial b...

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 o...

The quick and accurate way to test for the presence of ammonia. This kit reads 0-6 ppm of ammonia. Desiccant-lined tube, with snap-tight cap, provi...

The API® Reef Master Test Kit test 4 key parameters – calcium, carbonate hardness, phosphate, and nitrate – to keep reef inhabitants healthy. Testi...

A superior plant fertilizer in tablet form.  Contains key essential nutrients to stimulate lush plant growth.  Gets new plants off to a good start ...

API® Safe & Easy Spray cuts through white, crusty mineral deposits in your aquarium, leaving a protective coating behind to reduce future maint...

The API® Saltwater Master Test Kit measures the 4 most important saltwater parameters – pH, ammonia, nitrite, and nitrate – to enable easy testing ...

API® STRESS COAT water conditioner makes tap water safe for fish by removing chlorine, chloramines and heavy metals from tap water, and contains th...

API® STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keepi...

Benefits: Clears aquarium water Treats up to 210L Will not raise phosphate levels Fits most filters For use in fresh water, salt water, and reef a...

Tap water contains chemicals and toxins that are harmful to fish if left untreated. API® Tap Water Conditioner removes these toxins instantly, so y...

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...

Calcium is one of the most important elements in a reef aquarium. Reef invertebrates such as corals, crustaceans, mollusks and even some types of e...

Copper, a common treatment for many parasitic infections, must be monitored in an aquarium or a pond. The copper level can drop too low for the tre...

pH is the measure of acidity of water.  A pH reading of 7.0 is neutral.  A pH higher than 7.0 is alkaline, and a pH lower than 7.0 is acidic.  Main...

When keeping freshwater fish and plants, the general hardness (GH) and carbonate hardness (KH) of aquarium water should match their natural habitat...

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 al...

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 bre...

Phosphate can enter your aquarium through tap water, fish waste, and decaying organics such as uneaten food and dead algae. Excess phosphate contri...