stingeragent
New member
Ok, so getting a 40 breeder and using my current tank (20 long) as the sump. Will be drilling the 40. I picked up an internal overflow off ebay rated at 600 gph. Dimensions are LENGTH 7-1/4"WIDE 2-1/4" HEIGHT 5" . The biggest question is, how high do I drill the hole? I've got 5 inches to work with provided I like that overflow when I get it. Should the hole be toward the bottom of the overflow, middle, top, etc? The 2nd question is, how far should the teeth be sticking out of the water? Tank is going in bedroom so I'm trying to keep it as quiet as possible. I'm just thinking if the overflow is placed too high the water will have further to fall making noise. Last question is, do I have to put some kind of standpipe in the overflow or just having the bulkhead open will be fine.