im having the hardest time keeping my water from yellowing. after putting hundreds of dollars into this tank id like it to look good. iv been told it's from all the driftwood leaking tannis. personally i think it's from the several hundred MTS iv got crawling around under the sand. i dont want to remove either from my tank. is their anything that i can do get things cleared up? will simply putting carbon in my water work? if so how long does it work? im looking for a longterm fix that is low maintenance and will not hurt my snails (in addition to the MTS i have two anatome helenas, 3 nerites, and one other funny looking snail that i haven't identified). got any ideas?