mtech

Dichlor/bleach! Honestly, its been the best and easiest method I've used. Use the pool calculator to get your chemical amounts right - https://www.poolcalculator.com/. You input the size of your spa, what you want to do, and it gives you the exact amount to use.

Great info here. I'm trying to follow it religiously. One question, what is CD? In Nitro's post, they say to "Check CD as needed (once a week to start)". I've searched around and can't figure out what CD is. Thanks.