Originally Posted by Deep Seven
Only do this if you're worried about water loss or you start using the heater. Evaporation = heat loss. If you add a small fan blowing at the open part of your sump it will add to the cooling, but also increase evaporation.
Intersting dilemia huh? LOL.....I think I'll play it by ear but my original thoughts were to find a larger sump that I could house 1 or two more pumps in (for various reactors or uv
sterilizer, etc.) because this sump, while desinged nicely, is setup rather poor; I cannot get at the bio balls to remove them and put live rock in it's place. It seems they put them in and built the walls around it, essentially sealing them in there.
I'm sure I can find a 40-55g tank on craigslist for close to nothing and design another one as I did before.....we'll see though.
For now, I'll stick with the open sump and the small fan that's blowing on it. If evaporation gets to be too much, then I'll try a lid, although I have a hose and the top of the skimmer sticking out so I'll have to get creative with the lid.