Alfagrog is a light weight material used for Filtration & Bio Filtration to make your Fish Pond as clear as possible. Alfagrog is made of ceramic rings, lava rock, plastic foam and plastic coils. Many types of biomedia are to be found in pond filters the most common of which are a variety of plastic tubes or balls. One Litre of Alfagrog (approx 500gm) is sufficient to purify 1,000 litres of pond water with normal stocking density. If you have a high stocking density then increase the amount to 2 litres per 1000 litres of pond water.



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