so recently i switched over to a sump and skimmer and i using a hob overflow box, cpr cs50. I put a check valve on the line as well which i later found out i didn’t even need it because it wouldn’t serve any purpose, im having an issue where i don’t see a constant flow of water coming out of it and i’m not sure if it’s due to the check valve or what it’s not upside down to where it won’t allow the flow to come through so i’m kind of lost, i’m using an aqua lifter pump as well and it just seems to fill it up to the weir instead of overflowing and draining out.