I have an empty 40gal & an empty 20gal sitting in the closet. After my next deployment I'm planning on doing a low maintenance 40gal green terror cichlid tank. I have 2 questions for you guys. Do you think it is worth while to build a sump out of the 20gal since I'm going for low maintenance and I'm only going to put one green terror in it? And I have heard good things about how fluidized bed filters are awesome bio filters. Should I use one on my 40gal? I know big cichlids are big waste producers so I figured a good bio filter is a good start. Tell me what you guys think. Any advice and or experiences with similar ideas will be much appreciated.