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API® 5-IN-1 TEST STRIPS are the quick and easy way to test the 5 most important aquarium water parameters – pH, KH, GH, nitrate, and nitrit...

API Accu-Clear water clarifier quickly clarifies cloudy water in your aquarium, eliminating haze to make your water crystal clear. API Accu-...

API Accu-Clear water clarifier quickly clarifies cloudy water in your aquarium, eliminating haze to make your water crystal clear. API Accu-Clea...

API Accu-Clear water clarifier quickly clarifies cloudy water in your aquarium, eliminating haze to make your water crystal clear. API Accu-...

API AlgaeFix algae control effectively controls many types of algae in aquariums and will not harm to your fish or plants when used as direc...

API AlgaeFix algae control effectively controls many types of algae in aquariums and will not harm to your fish or plants when used as directed....

API AlgaeFix algae control effectively controls many types of algae in aquariums and will not harm to your fish or plants when used as direc...

API AlgaeFix algae control effectively controls many types of algae in aquariums and will not harm to your fish or plants when used as direc...

API Marine AlgaeFix algae control effectively controls these types of saltwater algae: Green algae (Cladophora), “Red Slime” (Oscillatoria &...

API Ammo-Lock ammonia detoxifier is proven to convert poisonous ammonia into a non-toxic form. Ammo-Lock ammonia detoxifier works instantly ...

API Ammo-Lock ammonia detoxifier is proven to convert poisonous ammonia into a non-toxic form. Ammo-Lock ammonia detoxifier works instan...

API Ammo-Lock ammonia detoxifier is proven to convert poisonous ammonia into a non-toxic form. Ammo-Lock ammonia detoxifier works instan...

Treat your tap water, and provide a safe environment for freshwater fish instantly and easily with API Aqua Essential water conditio...

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

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

Instantly makes water safe for Bettas by removing chlorine, chloramine and heavy metals from tap water and adding electrolytes. It also detoxifi...

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

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

An all natural salt, made from evaporated sea water. Helps improve gill function to reduce stress. Reduces electrolyte loss and promotes healthy...

An all natural salt, made from evaporated sea water. Helps improve gill function to reduce stress. Reduces electrolyte loss and promotes healthy...

Rid your fish of fungal infections quickly and effectively with API LIQUID FUNGUS CURE Freshwater Fish Medication. API LIQUID FUNGUS CURE Freshwate...

Together, Ammo Lock and Stress Zyme assure good water quality, an efficient biological filter, healthy fish and a clean aquarium. Use when setti...

Use to measure pH changes in marine aquariums, aquariums with African chchlids, and very alkaline tap water. Reads the pH of water within the...

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