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bubble diffusors
Constant - Constant flow
It instantly establishes a biofilter
specifically designed for use in gravity-fed
Alfagrog E40 Ceramic Pond/Aquarium Filter Media 15kg 75gal bubble diffusorsAlfagrog is a porous foamed ceramic material, which is lightweight, strong and inert. Bag weighs approx 15kg in weight, but as it is a natural product please allow for some variance. It's high surface area makes it the natural choice for colonisation by micro organisms in biological filtration systems resulting in cleaner water. Benefits of Alfagrog over other filter media: Extremely high surface area Highly porous Inert, pH neutral Lightweight
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