Originally posted by enomadra
I had the same problem. I have an above display Refugium that is gravity feed back to the main display. I am using a regular bulkhead screen and drilled a hole in the top, then I inserted an acrilic straw that extends up to the top of the over flow box (well above the waterline) and I have no more bubbles. I will try to take a picture of it and post it tonight after I get off work.
Yeh, a picture would help. Thanks!!