is it possible to add a diverter valve to an above ground pool's filtration system so that I can vacuum to waste. I have a summer escapes above ground pool 14'x48" with SFS 1000 filter system that uses a type c cartridge filter. I want to be able to get rid of a major algae build up from vacationing, but do not want to have the algae to go straight back into the pool through the pump. my husband told me to use hth green to blue I and II shock treatment. after A LOT of googling, I realized I wasn't supposed to use that if I didn't have the option valve of vacuum to waste. but I read about this guy with a cartridge filter also and he did the hth shock treatment too and the next day when it was time to vacuum the dead algae, he unhooked his return hose and put it into a bucket of water (to prevent air bubbles) and he let it overflow and drain into his grass. is that a good idea??? I never had a pool before and uuuggghhh.....this is WORK!!!!! PLEAAAASE HELP!!!! oh yeah...and could I actually hook up some type of diverter valve (whatever the heck that is)!