I've been working at this so hard! Now I'm stuck at figuring out how to use the MPS. I'm sure you've gone into more detail elsewhere, but I can't find the term using the "Search" bar.
How much do I add to "help the bleach" work? How much do I add to oxidize what the bleach has already killed? Or am I misunderstanding its role? My tub is 400 gallons. It gets heavy use. MPS doesn't seem to be in the Pool Calculator. Thanks so much.