exactly, sorry did not make it clear I was shouting for Eheim not the type. My self I quite like the Biopower , but have not had the chance to play with the Biopower
I use aquaballs to supplement my externals, never have any probs at all. I fill one of the baskets with fluval bio max. Not sure which is better tho as haven't used Biopower
I use both, can't see much difference with them except when I opened the biopower one to lean the little balls go everywhere :wb: but maybe i'm just clumsy but will stick with the aquaball all sponged ones in future