"Jerry Baker" wrote in message news:VjpRg.1946$Vk4.918@trnddc01...
Wayne Sallee wrote:
Yep, definitely don't have enough water flow for a reef tank, if the
water level is that low.

Ya, the tank is a freshwater tank but trying to ask anyone in freshwater
about overflows and sumps isn't likely to get much response. The flow is
about at the limit of what the 1" drain can handle.

Is this tank purchased with overflow or you built it yourself?
Usually, tanks available at stores (Allglass, Oceanic) have
overflows properly designed to rise water above frame level.

If this is do-it-yourself overflow, than I would suggest modyfying
the hight of the comb - limit the flow through the overflow
on the side where the water leaves the tank. Plug couple of
teeth/cuts in the comb to limit speed of water flowing on the
other side... This will rise the water level. Do not overdo it...

p.s. what pump do you use ? how much gallons/hour or litter/hour ?