Currently have a 40 breeder, not drilled, with HOB
skimmer, and all essentials... To the point - going to buy a new 40 breeder and drill it. I need some advice on what size holes/bulkheads and if I should drill 1 hole for the drain and do an up and over for the return or drill a second hole and use locline for a return. Would like to push around 500 gosh through the sump, which will be an eshoppes s75, 2 chamber for a skimmer and return. I am not concerned with a fuge in the sump at this point. Thanks for any help!