You guys are gonna love this...

[mwsmith2]

For starters, Professor Langlier did NOT think his index was applicable to pools

Absolutely spot on, as usual. The index (and I'm just repeating this for the folks who don't know) was developed to keep boilers from corroding/scaling. In other words, it needs heat for it to be applicable. I'd say though, if you have a vinyl pool AND you have a heater, you're going to have a calcium requirement...because then you have a "boiler" that you are dealing with.

Again, this is an assumption on my part, but it seems to make sense.

Michael

[Rangeball]

I think this better explains Greg's positions-

"Retail Pool Store Manager, Previously worked for a commercial pool service company for 6 years."

His sig line, which apparently is turned off but still in his profile