BIO-DEX ZE04 1 gal Bottle Zeo Filter Cleaner 4 per case. Zeo Filter Cleaner performs a number of functions such as removing oil, minerals, and scale from the filter. This simple-to-use liquid formula is safer for your pool's equipment and will effectively clean and recharge Zeobrite, sand, and additional Zeo media so that they can perform at the highest possible efficiency. Your water will be cleaner and easier to manage when you keep your filter properly cleaned.