Hi, I just so happen to have a Hayward auto-feed tablet chlorinator in addition to a Hayward AquaTrol SWG, and am about to install everything. The AquaTrol is so said good for 18,000 gallons, but probably rated for Vermont's climate, not ultra hot/humid Louisiana. My pool is pegging it out at 17,500 gallons. My question is would it be a good idea to install the in-line chlorinator plus the SWG to supplement the hot days of summer for chlorine output? Any things to consider? Pool place mentioned putting a one-way check valve in between chlorinator and sand filter to prevent back-flow of ultra-pure chlorinated water from eating seals.....seemed plausible to me. Thoughts?