Marie,

Are test strips accurate at that level? I was thinking that they were not.

Also, she hasn't really added enough total chemicals to raise her calcium that high -- if her fill water was 100 ppm CH, it would have taken 140 lbs of cal chloride to get her to 1000 ppm . . . and to do it with cal hypo would have taken even more than that.

My first guess would be the test result is bogus. The second would be that -- if there is 1000ppm in her pool now, most of it came from the fill water.

BUT . . . that seems unlikely, since high iron and high calcium don't ever (that I've heard of) go together. So my money is on the bogus results.

I can think of another, pretty far out, possibility. If she had water trucked in, from a very high calcium source, but using a steel tank truck with nodular (bacterial) iron corrosion, she could have both, since the bacteria generate a *strongly* chelated iron that WILL turn the pool green at higher pH and IS very hard to oxidize out. When I've dealt with that stuff, you could flip-flop pool colors with pH: above 7.2: green; below 7.0: blue!