curious about Ca+

[PoolDoc]

My pool is vinyl, so I hardly ever check Ca+. I did check it today and noticed it is 60. It was well over 200 last August. I'm curious as to how that happened???

Possibilities:

• Leakage / splashout, followed by water replacement. (Not very likely, since it would require that you lost 75% of your water in a single episode, or even more, if you lost, say, 50% per episode.
• Scaling / precipitation. (Is your pool slimed, with what feels like sand on the liner / ladder / light rings under the slime?)
• Testing error. (Have you changed test methods, or replaced old test strips with new ones? Test strips are inaccurate, but get much worse over the summer as moisture from the air or your fingers causes them to deteriorate.

There may be some additional possibilities, but those are all I can think of at the moment.

Ben
"PoolDoc"

[HooStat]

One thing to do is test your water supply. There are generally only 2 sources of water for most pools (aside from trucks used to fill): city water (or well water) and rainwater. Rainwater is going to be about 0 for calcium and your tap water will vary by region (ours is 110). But if you are filling with tap water when the levels get a little low, that represents the lowest amount that you should see for the pool calcium level.

[pedsrn]

Hmmmm, I don't know. We haven't drained and refilled and the test I'm using is the ps233. Perhaps my reagent is bad. I'll retest after I get the 234. No, Ben, I swam this past week and didn't notice any slime or scaling <shrug>.

anyhoo, thanks for the replies!!