k so a guy at work is praising them, and reviews on marine depot look pretty good, i think im going to try one out, its only 40 bucks, but the thing is i think you have to buy a pump, and its able to hang on the back but i dont have room, or a sump, so where would i put it, can i jus set it underneath my tank in the stand?

Yeah, but then you would have to buy a pump to pump that far up and down. No biggie though. May prove to be a pain to change the media though. Check out Bulkreefsupply.com They have good prices on GFO and reactors.