Wound up going with Red Flint small gravel instead of sand. I pussed out. lol I know I would kick myself if I hated it down the road. I might try some in the 125 if I need all 350 lbs. of gravel for the new tank. I'm starting to get excited now. I need some gangsta sized driftwood pieces in there and some plants and we're all set. I noticed a leak again at the bulkhead I gooped up with silicone. Crikey! I guess that will leak for a while, because I'm not draining all this water now. At least it leaks into the sump, but it still pisses me off because I was going to cover the sump to keep heat in and evaporation at a minimum. Any idea where to get cheap filter material to set on top of the drip plate I have to make? Someone said McMaster Carr has some, and they are right by my work so that would be perfect.