I'm contemplating build a 10g system to test out the hypothesis of a self-sustainable aquarium that requires no water changes that was discussed here. I currently have a 10g AGA tank, base rock, live rock, sand, and an AC20. I'm thinking of picking up an inTank media basket for the AC20, Tunze 9002 with inTank collection cup, Jager TruTemp 50W, and Hydor Koralia Nano 425GPH. The Hydor Koralia Nanon 240GPH won't be enough I'm thinking but I'm open to hearing your guys' thoughts. I'm not sure what livestock I'm going to put in there for this experiment but I imagine Nassarius snails, some crabs, and corals. I'm not sure yet which poor fish will have to suffer through this but Brandie suggested some Mollies. Thoughts? Also, does anyone by chance have some equipment to let go for cheap so I can conduct this experiment, particularly the Tunze, inTank, and Hydro equipment?