what is the GPH of a 1 inch hole for a side drilled overflow? I drilled my tank with a 1 and 1/4 bulkhead and it can not handle my 700 gph pump. it oveflows the tank so im adding another? I was just wondering if anyone knows the GPH of a hole about 1 inch in diameter?
I dont think that there is an exact way to answer what the GPH will be... but you are doing the right thing adding another hole. My large cuttle tank when i had it, had three 1" holes on the side panel and that was a 600 or 700gph pump