SR Aquaristik NPX Bio-Activated Polymer - 500 ml - For Freshwater, Saltwater, Reef Terrarium Substrates Stable design helps minimize tipping

Stable design helps minimize tipping and spills

A European-made

New ergonomic AquaStop valves with raised lip for smoother operation

while bubbles improve the circulation and oxygenation of your aquarium water

facilitating recovery processes in amphibians

SR Aquaristik NPX Bio-Activated Polymer - 500 ml - For Freshwater, Saltwater, Reef Terrarium Substrates Stable design helps minimize tippingNPX Bio Activated Polymer is a pelleted nitrate and phosphate reducing filter media designed for use in fluidized reactors. Made from 100% pure carbon polymer, it optimizes water quality and reduces maintenance by supporting the growth of denitrifying bacteria. Ideal for freshwater, saltwater and reef applications. The manufacturer recommends using NPX Bio Activated Polymer in a media reactor to ensure constant motion and water flow. Use of an