Marineland® products are designed with both performance and style in mind. We push precision and power beyond the expected and listened to our loyal customers to make our products even better. We do this because at the heart of our innovative spirit is a desire to help hobbyists everywhere do more, create more and, most of all, enjoy more. So whatever you’re passionate about – freshwater or saltwater, big or small, beauty or science – make your aquarium your own. Marineland Ammonia Reducing Resin works in most freshwater aquarium filters to reduce ammonia and nitrites and boost chemical filtration. This resin adsorbs ammonia faster than zeolite. Place Marineland Ammonia Reducing Resin into your nylon mesh bag, test ammonia with an aquarium test strip, and calculate the number of tablespoons of resin needed. Remove and/or replace when color changes – the blue resin changes color to amber when depleted. Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland brand has the filtration products you need to deliver on-target, advanced filtration.