Our cartridge cleaning tablets are simple to use and specially formulated to penetrate deeply into any reusable filter cartridge and remove the accumulated materials such as suntan lotion and oils, body oil, grease, dirt, soap scum and other organics. This thorough cleaning allows cartridges to return to a high level of original performance without harming the filter. Unlike other cleaning agents, ours comes in individual formulas: one for pools and one for spas, scientifically engineered for each environment. So let us do the work for you, simply and effectively.