【 Easier life】 700g replaces the power of 25kg filter sand, quartz sand or 20kg filter glass. This saves you energy and time when refilling the filter Remarkably clean: filters even the smallest dirt particles down to 1 micron and also filters grease from the water 【Reusable】 100% polyethylene material, the filter balls can be washed and reused. Save energy, cost and other pool accessories Universal use: our filter balls are universal for cleaning almost all filter boilers. Also suitable for sand filter pumps in salt water. 【Scope】 Swimming pool, filtration pump, aquarium, etc. Using filter balls can lead to clean and clear water quality effect