someone gave me a new in the box 29 cube. I've never used it due to the fiter system being crap. I have heard rumors of modified filter system and seen a few with external fuges and sump. I really don't want that eye sore beside the tan unless I can help it. does any have designs or seen mods done to the regular system? I removed all the bio ball, but still not sure about the design even with out the bioballs, any ideas or success stories;.