Apl Accessory For Aquarium Dose Crystal Box Of 6 Size 1

API CRYSTAL is composed of a unique blend of resins and high porosity activated carbon that makes the water crystal clear and eliminates odors from your aquarium water They are intended to harbour bacteria in your aquarium. These bacteria are essential to ensure the transformation of organic pollutants into non-toxic material API CRYSTAL size 1 for RENA SuperClean 40 filters Warning:Not suitable for children under 36 months ...