hey great tank. my tank is some sort like urs, except it's a 2 1/2 feet(30 inch) tank. Is a custom made tank with cut out corner. I used soft and hard filter media(those green carpet like thing, what u call that anyway?) to filter out debri and a partition with corals, bio ring, gravel n sand. I wonder if bacteria can survive there since the water will mainly consist of co2. by the way, do planted tank actually needs biological media since the plants itself will act as the biological filter.