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

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

Effective for both fresh & saltwater aquariums. High levels of nitrate are a food source for unwanted algae & indicate poor water qua...

Tests for nitrite in freshwater & saltwater aquariums. Nitrite, toxic to fish, is produced by nitrifying bacteria in the biological filte...

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 ...

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...

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...

API® pH UP pH adjuster raises pH levels in your aquarium to make water more alkaline when levels fall too low. pH is the measure of acidic or al...

API® pH UP pH adjuster raises pH levels in your aquarium to make water more alkaline when levels fall too low. pH is the measure of acidic o...

API® pH UP pH adjuster raises pH levels in your aquarium to make water more alkaline when levels fall too low. pH is the measure of acidic o...

API Pimafix fish remedy is an all-natural, antifungal remedy for fish fungal infections, with a formula derived from the West Indian Bay Tree –...

API Pond Accu-Clear Water Clarifier quickly clears cloudy pond water by causing tiny suspended particles to clump together, forming larger particle...

API Pond AlgaeFix algae control effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) in p...

API Pond AlgaeFix algae control effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) in p...

API Pond AlgaeFix algae control effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) in p...

API Pond AlgaeFix algae control effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) ...

Treat your tap water, and provide a safe environment for koi fish instantly and easily with API Pond Aqua Essential water conditioner. Tap water co...

API Pond Chlorine & Heavy Metal Neutralizer instantly makes tap water safe for pond life by neutralizing chlorine, copper, lead, and zinc, in a...

API Pond Melafix fish remedy acts as an all-natural, antibacterial remedy for koi and goldfish diseases, including eye cloud, mouth fungus, fin &am...

API Pond Pimafix fish remedy contains an all-natural formula that rapidly treats fungal infections on the body and fins of your pond fish, in addit...

All-natural API® POND SALT is made from evaporated sea water, and provides essential electrolytes that fish need to survive. Salt improves gill fun...

All-natural sea salt improves gill function, protects against nitrite toxicity & reduces stress by helping maintain a natural balance of ele...

Simply Clear quickly and effectively clears up murky, cloudy water while improving water quality. A special blend of bacteria effectively breaks do...

API Pond Stress Coat Water Conditioner instantly removes chlorine and breaks the chloramine bond to make tap water safe for your pond. Replaces the...