Heya Dunc

What have you done about an ATO on this tank ?

Besides that dead horse;

One thing you could try would be to put a 'tee' with a gate valve on the return pump, and have it dump back into the sump.
I had to do this with my current setup as the plumbing doesn't allow for my pump to run full-out.

Instead of tuning my drain, I tune my return. It's been flawless for 2-1/2 years and my pump isn't strained with any restrictions.

The only time I have to fiddle with it is when either the pump intake strainer gets mucked up, or if I've had my arms in the water for awhile and the displacement messes with things.

Maybe one day I'll bump up my drain plumbing from 1" to 1-1/2" ... :rolleyes:

Did we ever find the answer for this?

Hi,

Yeah I did. I've been keeping up with topping up my sump and it keeps the level more even. Even though, sometimes if I'm away for a couple of days and I don't top up my sump, the level in the overflow stays level. Its like it just settled or something.

Any who, all sorted. Thanks for everyone's help. I am going to set up an ATO in the new year when I get some money again.

its a common issue , def gets annoying :)

are you using just straight stand pipes or do you have durso's , stockman etc ?

http://www.aquahub.com/store/diygaquarium.html

inexpensive auto top off solution... i still use it on my small tank, works great

Straight up and down pipes.

Thanks for the ATO link