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

[waste]

When you shock a pool with calcium based shock, how much calcium do you add?

Clean, you might want to cancel this post and repost in the chlorine or alk and hardness areas, the post you're on is being censored, and the members who could most help you probably won't see this. If I can do it, I'll try to get one of the moderators to move this to the appropriate area. BTW it's lbs of 'x' %/ gal which determines the increase.

[Watermom]

Waste - I moved Cleancloths' post to the other forum.

[waste]

Thanks mom

[jereece]

I have a 27' AG pool that is 6 years old. My water is very soft. When I check it for calcium using a Taylor kit, one drop and the color change is made. So my calcium level is close to zero. I have not seen any unexpected corrosion or liner degredation.

Jim