Redsea Original Fleece Roll Replacement Filter Roll for Red Sea NanoMat ReefMat 250 ReefMat 500 ReefMat 1200. Designed specifically as a replacement filter roll for Red Sea NanoMat, ReefMat 250, ReefMat 500, and ReefMat 1200, this fleece roll ensures a seamless fit. It integrates effortlessly with your existing filtration system, maintaining the optimal operation of your Red Sea aquarium equipment. No need to worry about mismatched parts – just swap and enjoy consistent filtration performance.The Redsea Original Fleece Roll features a dense, high - quality fleece material that effectively traps fine debris, detritus, and particulate matter in your reef tank. It captures even the smallest particles, preventing them from circulating back into the water column. This helps keep your aquarium water crystal - clear, creating a healthy and visually stunning environment for your marine life.Crafted for durability, this filter roll offers long - term filtration efficiency. The robust fleece construction resists premature clogging, allowing it to handle heavy debris loads and extend the time between replacements. By reducing the frequency of roll changes, it saves you money in the long run while maintaining reliable filtration for your Red Sea reef system.Swapping out the old filter roll for this replacement is a quick and hassle - free process. The roll is designed for straightforward installation – simply remove the used roll and insert the new one into your ReefMat system. This easy maintenance routine ensures that your aquarium's filtration stays at peak performance with minimal effort, so you can spend more time enjoying your reef tank.By effectively removing organic waste and impurities, this fleece roll helps maintain water quality parameters crucial for a thriving reef ecosystem. It reduces the burden on other filtration components, like protein skimmers and biological filters, promoting a balanced and stable environment for your coral, fish, and invertebrates to flourish.