Ok im in dire need of a clean up crew I have 2 29g biocubes one is a hqi so far I bought a dragon sand sifter and a golden head sand sifter(there not in the same tank lol) and a scooter blenny in each tank so far my hqi tank is perfect but my stock tank the sand is turning brownish and I saw a majano in there what do I do I have snails and crabs but for some reason my stock tank isnt as clean looking as my hqi what do I need to get to get this back under control