Your Underwater World, Made Easy
From crystal-clear tanks to vibrant fish – discover everything you need for a thriving underwater world
Discover our tools and products for every fish keeper
From proven treatments to smart diagnostic tools, explore the resources that help you keep your fish and water in perfect balance.
API Assist
Get instant answers and expert guidance for your aquarium or pond questions 24/7 with just one click, helping you keep your aquatic world perfectly balanced.
API Products
From beginners to experts, API provides trusted treatments and care products that make it easy to create and maintain a healthy, beautiful aquarium or pond.
API Aquaspin™ Advise
Track key changes inside your aquarium or pond and get personalized care advice based on your water tests — at home or through your nearest AQUASPIN retailer.
Aquatic Experts
since 1964
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LATEST ARTICLE
Green water, Cloudy water - What should I do?
Algae growth in your aquarium can occur for a number of reasons — from excess nutrients to too much light. This helpful guide explains why it happens and how you can effectively reduce algae at its source for a clearer, healthier tank.
Explore Products That Make the Difference
API MARINE MELAFIX Saltwater Fish and Coral Bacterial Infection Remedy heals bacterial infections
Treat your tap water, and provide a safe environment for saltwater and reef fish instantly and ea
Most water problems are invisible to the eye.
Treat and control algae growth and reduce your freshwater aquarium maintenance with API ALGAEFIX