- Rinwywey GLM-01 filter balls designed for pool, aquarium, and filter pump filtration systems - Made of high-quality polyethylene, ensuring fast and efficient filtration - 700g of filter balls replace up to 25kg of conventional filter sand - High adsorption capacity, capturing suspended solids and grease down to 1 micron - Long lifespan, reusable and suitable for machine washing (use a laundry bag) - Compatible with most existing sand and glass filters - Eco-friendly and economical solution to keep water clean and crystal clear in pools and aquariums