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Review title: not worth it
Product review: I have a 2000 gal fish pond. When I saw this product had no effect after 2 months I called my man at the pet shop, he knows his stuff about ponds, what he said is this is just a bunch of hooey and I am just wasting my money. He said the most effective bio filter is to put 3" of the pea size gravel at bottom of pond and also get a big tub put the gravel in it run a water fall through the tub and also put some floating plants in. this is not so much for algae but to control the ammonia level produced by the fish.
