BIO-DEX FC04 1 gal Bottle M2000 Filter Cleaner 4 per case. M2000 Filter Cleaner is a professional strength filter cleaner that cleans while protecting the pool filter and other pool equipment. A clean filter improves water circulation and can dramatically improve the clarity of the pool water. M2000 Filter Cleaner can remove a variety of contaminates from filters such as scale, grease, rust, oil and soil. You can apply the product directly to the filter or use it as a soaking agent. You'll find that the use of this product helps you keep your water clean and sparkling. It will also keep your pool filter and other equipment running efficiently over the long term.