Take cartridge cleaning in a new easy to use direction. Pleatco FilterWash tablets come in an attractive dispenser box that lists features, benefits and instructions so you can immediately understand the simplicity and the strength of the product. Each tablet cleans up to two filter cartridges and works by loosening debris from the filtration fabric simply and effectively while being safe and easy on the cartridge. No measuring or messy chemicals! 100% environmentally friendly. Tablets come individually wrapped with a fold-out booklet that includes instructions. One tablet cleans up to two filter cartridges. Tablets are sold individually. 30 tablets per box.