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Carbon deficiency is one of the leading causes of poor plant growth in aquariums. API® CO2 BOOSTER product adds essential liquid carbon for planted...

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 treatmen...

API® TROPICAL FLAKES is designed specifically for tropical community fish such as Angelfish, Tetras, and Barbs, and contains a unique, nutritionall...

Size: 31 g API® TROPICAL FLAKES is designed specifically for tropical community fish such as Angelfish, Tetras, and Barbs, and contains a unique,...

The API® FRESHWATER MASTER TEST KIT measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range ...

API® AQUARIUM SALT is made from evaporated sea salt and is a must-have for your aquarium! AQUARIUM SALT promotes fish health by improving gill func...

API® AQUARIUM SALT is made from evaporated sea salt and is a must-have for your aquarium! AQUARIUM SALT promotes fish health by improving gill func...

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

API® GOLDFISH CARE PACK makes goldfish care quick and easy by combining the superior water conditioning of GOLDFISH PROTECT, which removes harmful ...

API® GOLDFISH PELLETS is designed for all types of Goldfish, and contains a unique, nutritionally-enhanced protein to ensure easy uptake of nutrien...

API® GOLDFISH PELLETS is designed for all types of Goldfish, and contains a unique, nutritionally-enhanced protein to ensure easy uptake of nutrien...

API GOLDFISH PROTECT makes tap water safe for goldfish by removing harmful chlorine, chloramine, and ammonia from tap water. It also detoxifies amm...

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...

The API® KH TEST KIT tests fresh or saltwater aquariums for carbonate hardness (KH), and helps monitor water quality and prevent invisible water pr...

API® CICHLID LARGE PELLETS contains squid and Menhaden to provide essential amino acids that assist in the optimal growth of your fish, as well as ...

API® LEAF ZONE plant fertilizer contains iron & potassium for colorful leaves and a vibrant planted aquarium. Product is formulated for rapid a...

API® LEAF ZONE plant fertilizer contains iron & potassium for colorful leaves and a vibrant planted aquarium. Product is formulated for rapid a...

API® SUPER ICK CURE fish remedy treats “Ich,” or white spot disease, in fish, along with other highly contagious parasitic diseases. The Ich parasi...

API® SUPER ICK CURE fish remedy treats “Ich,” or white spot disease, in fish, along with other highly contagious parasitic diseases. The Ich parasi...

API® MARINE MELAFIX fish remedy is a safe, natural fish remedy which should be used to treat bacterial infections in saltwater fish and corals. MA...

API® MARINE QUICK START nitrifying bacteria enables you to start your aquarium immediately, allowing for the instant addition of fish as it kick-st...

API® MARINE STRESS COAT water conditioner instantly removes chlorine, chloramines, and ammonia from tap water to make water safe for fish in your s...

API® MARINE STRESS ZYME bacterial cleaner contains millions of live bacteria that consume sludge and organic debris, reducing aquarium maintenance ...

API® MELAFIX fish remedy is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wou...

API® MELAFIX fish remedy is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wou...

API® MELAFIX fish remedy is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wou...

API® MELAFIX fish remedy is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wou...

API® TROPICAL MINI PELLETS contains high-quality proteins – including squid and shrimp – for optimal growth for smaller fish, and perfects palatabi...

API® TROPICAL MINI PELLETS contains high-quality proteins – including squid and shrimp – for optimal growth for smaller fish, and perfects palatabi...

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...

API® CHICHLID PELLETS contains squid and Menhaden to provide essential amino acids that assist in the optimal growth of your fish, as well as a nut...

API® CHICHLID PELLETS contains squid and Menhaden to provide essential amino acids that assist in the optimal growth of your fish, as well as a nut...

API® TROPICAL PELLETS contains high-quality proteins – including squid and shrimp – for optimal growth, and perfects palatability with garlic. API ...

API® TROPICAL PELLETS contains high-quality proteins – including squid and shrimp – for optimal growth, and perfects palatability with garlic. API ...

API® PERFECT START is a unique aquarium starter pack that provides everything you need to kick-start your new aquarium, keeping your fish healthy a...