Hey, kind of a stupid question but, i ordered a IM 75g INT and and im trying to get all the piping figured out, especially for the return from the pump. I'd like to use PVC for everything. I'm looking at one of 2 pumps, either the Reef octopus VarioS-6 with the output at 1.25" coupling fitting and the VarioS-4 with 1" Slip PVC. So im trying to figure out what would I need to do with the return on my tank to get it to fit from a 3/4" fitting to a 1" or a 1.25" fitting. I dont want to order the wrong thing.