Alfagrog
Alfagrog is a porous ceramic pond filter media which is made under controlled conditions in Staffordshire, U.K.
Alfagrog pond filter media has a very high surface area making it an ideal material on which micro organisms can adhere and boost biological decomposition of pollutants.
Alfagrog is a Volcanic rock and has been used now for several years with a great deal of success .. it is very inert and soon colonises with beneficial bacteria ...
Alfagrog is made of a highly porous material that contains many thousands of tiny pockets in which bacteria can thrive making in an ideal material for biological filters |
