It's not great but does the job. Got to watch out for the inlet/outlet adaptors cause they are made of plastic so if turned too hard you will crack it. It got rid of the ick in my brother's marine tank.

You shouldn't... They're the only one I'd like to use... Very convenience to maintain and do a very good jobhangner;1424942;1424942 said:^nice link dont feel so bad about buying a turbotwist anymore