I have a new 30'x54" AG 20k gallon pool I am installing. I live in Texas where it's hot and sunny with extended pool seasons. As for as equipment we bought a Hayward C3030 cartridge filter and the Pentair SuperFlo VS. I've been on the fence with the SWG selection but I am about to pull the trigger and go with CircuPool SI-45 plus. Is there any negatives to having an over sized swg?