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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® 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...

API® pH DOWN pH adjuster lowers pH to make freshwater aquariums more acidic for fish and plants when levels rise too high. pH is the measure of aci...

API® pH DOWN pH adjuster lowers pH to make freshwater aquariums more acidic for fish and plants when levels rise too high. pH is the measure of aci...

API® pH DOWN pH adjuster lowers pH to make freshwater aquariums more acidic for fish and plants when levels rise too high. pH is the measure of aci...