API Water Treatments and Water Testing Kits

139 Products Found
API Fishcare by Mars have made high quality aquarium products for over 60 years. API make some of the most popular water treatments like Stress Coat and Stress Zyme. They also make water testing kits, filter media and fish food for aquariums and ponds.


About Us

At API® brand, we are passionate about fish keeping. We have enthusiastically supported the aquatics industry for almost 60 years and continue our commitment today.

The research and development scientists at API brand have pioneered scientific studies on aquarium treatments that have led to significant advances in the care of ornamental fish. This work has garnered over 30 global patents for breakthrough innovations in the aquatic industry. We continue to look for ways to improve the fish-keeping experience and expand the hobby.

With API products availability in North America, the United Kingdom, continental Europe, and Asian Pacific, we strive to make sure that our products are available where and when you need them. Today, API’s family of products includes treatments, testing, and nutrition for both indoor aquariums and outdoor ponds.


For almost 60 years, API brand has been a leader in the aquatics industry, developing and perfecting products and solutions for indoor aquariums and outdoor ponds. In 2003, Mars, Inc., acquired Aquarium Pharmaceuticals, Inc., and the result has been a stronger company with a vibrant background in fish keeping and the trusted reputation of Mars and the Waltham Centre for Pet Nutrition.

API Aquarium Products Online

Shop for the full range of API Products at Aquarium Kingdom's online store. Purchase the most popular API Water treatments including Stress Coat, Stress Zyme, accu-clear, algaefix, melafix, pimafix, master test kits and so much more..

Keeping your fish tank crystal clear is easy with the range of API filter media like Bio chem zorb, Nitra-Zorb and Phos-Zorb. Buy them online today and have them delivered Australia wide from our Sydney Warehouse.