Got my overflow up today , its great, no noise, im fiddling with level, its got a auto syphon so if power goes out it restarts, i take water now from my main system, - no more water changes in it, and stable temp plus manual top ups , should be really stable, its like a 250 gal nano.
Heres a photo of the nano and my frag tank beside that it draws from the frag tank is fed from my main tank , the other photo.
thanks for the tips..
brent
http://s1182.photobucket.com/albums/x453/bkelly7/