You guys are gonna love this...

[PoolDoc]

On a vinyl pool you can keep it around the 150 range, inside of your pump there is a mechanical seal which keeps the water from hitting the back of the motor. With corrosive water this will rust causing water to eventually leak which also means water is getting in the shaft.

Unfortunately, till I get caught up on kits, I can't pursue this issue. I'll try to get back to it in a week or so.

Meanwhile, Greg, I'm going to have to disable your registration. I'd asked you to back off, and read some of the PoolSolutions stuff before posting. Now, I've got some complaints, and a quick check shows you posting stuff that I've identified for years as TEKTATs (Things Everybody Knows That Aren't True). You can debate me on those points, in this section, but you can't post those sorts of things till you've done the debate.

(For starters, Professor Langlier did NOT think his index was applicable to pools, AND the product engineer with Canadian General (one of the major mfgs of vinyl sheet for pools) had never seen any evidence to support the calcium in vinyl pools recommendations.)

Regarding calcium:

• Calcium is NOT necessary for vinyl pools;
• Lack of calcium does NOT cause stainless steel seals to rust,
• Nor, does the presence of calcium decrease the corrosivity of water under the conditions that exist in pools, outside of heaters.
• Calcium's presence INCREASES the likelihood of damage to copper heat exchangers;
• etc.

I've done this debate many times before, but unfortunately, those archives are gone. I'll resurrect some of those this coming winter, but probably not before. But, once I have time to deal with this, I'll re-enable your registration and email you to let you know I've done so, and then we can duke it out here.

For everyone else . . . here are some of the relevant PoolSolutions pages:

http://www.poolsolutions.com/tips/tip72.html

http://www.poolsolutions.com/gd/chem_never.html

http://www.poolsolutions.com/tips/tip03.html

Ben

[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