Kolar Labs GFO Bayoxide E33 Phosphate Remover – for Freshwater and Saltwater Aquariums, Reef Tanks, Promotes Coral Health (454g)Brand: Kolar Labs Features: HIGH QUALITY: High quality, ultra pure virgin Bayoxide E33 granular ferric oxide (GFO) with reduced fines; Removes phosphates from water CLEANER AND HEALTHIER AQUARIUMS: Reduces phosphates to help keep aquariums clean and clear, and aquatic life healthy SAFE FOR ALL AQUARIUMS: Works in saltwater and freshwater aquariums, reef tanks, ponds and more USE INSTRUCTIONS: Works great in reactors, filters socks, canister filters,