This isn't really about filters but you lucky folks with the 350, 500, to 1500 have allot of patience. Sometime when I'm reading threw the forum I think to myself it must be boring with all the post for smaller equipment? I mean no disrespect to anyone it's just it must be a whole different world with the equipment required etc just to run these large tanks even though the principal is the same. I mean I know what trickle filters are but things like heating, water changes, Pump systems? I've never seen whats required just to keep these running and I probably will never have this size but that dosn't mean I not interested?