i need a good and inexpensive canister filter. ive been lookin at the xp3 or 4 some people love em some say they suck. ive got 2 penguin 350s on my 90g now and they suck! they are clogging every 4 days! i know 2 many fish. i would like to be able to put my own media in it other than the overpriced crap that is "designed" for filters. oh and i will be upgrading to a 200g soon so what will work with that?