Ok so I’m still new to this website and the hobbie. I have a 40 gallon saltwater tank.. Fish and live rock only.my tank is 4 feet high. I’ve been using a fluval canister filter and Im honestly fed up with canister filters and wanting to move to sumps. I have a diy 10 gallon fish tank made to a sump. I just bought a bubble magus 2.5 protein skimmer to go in my sump. Now for the reason why I am asking for help. I need a return pump and overflow box. Any recommendations ? I am being thrown off with how many GPH I need for my tank. I was thinking of getting the RIO 12HF hyperflow water pump. And the marine depot overflow Box OF-800. Will this work out? I am hoping to have everything running smoothly no overflow mess and I don’t want my new filtration system to be too loud. Some noise is ok. Any other recommendations if you don’t recommend an overflow box ? I don’t want to drill holes in my aquarium tank when it’s already up and running.