has anyone ever heard of these? I have 2 of them. Millennium 2000, They were given to me, with a 45 g. does anyone have an idea how powerful they are like equivalent to say a aquaclear 50 or a 70? I'd really like to know, thanx.
i have 2 Millennium 3000 and i think they are great. but one problem with them is the bio blocks....filter sponge is so much better....just get some of that and replace the bio block.