Clear, but no chlorine???

[BigDave]

Let's not add anything to raise pH or TA for a while. I'd like to see it come down. Half a box of Borax would have had about half the effect on pH and little effect on TA. Right now (your cloud proved it) your pool is dangerously close to precipitating calcium either as a cloud in the pool or onto your heater or as scale at the waterline.

The CYA test is hard to read, I'd call 140ppm the same as 150ppm.

Keep the FC at 15ppm with bleach, if it drops below 10, check pH. Enjoy the party if you can - pool parties at my house are pretty stressful for me - I count heads alot. I really only relax when the pool gate is locked.

[mary jo]

Yes I am a giant stress ball during pool parties- and I haven't had that many yet! I wanted to ask about safe chlorine levels for swimmers in my pool. I read ( and re-read) the info about CYA /free chlorine levels , but wanted to double check with you. What is a safe FC level for swimmers given my high cya? Oh- pH is currently 7.6

[BigDave]

At 150ppm CYA, the pool is safe between 8 and 15. I don't recall if I've asked you to look at the Best Guess Chart. It explains the relationship between CYA and chlorine.

How does the pool look? Did you measure FC / CC this morning?

[mary jo]

Good Morning! At 10:00 last night I put 2 jugs into the pool to bring the FC high enough so that I would be OK until this morning. At 8 the FC=9, CC=.5 The pH=7.6 (so I'm losing much less FC per hour today!)

I found the Best Guess Chart and it makes perfect sense to me, but I guess being told for years that you "never, never, EVER want to swim in anything higher than a 4 or 5..." takes some getting used to.
I know you guys must get this all the time, but it's really like we're Neo (from the Matrix movie) and you're Morpheus and we've just taken the red pill….strange indeed.
But I get it now.
Fingers crossed for good weather- it's cool and 40% chance of rain. Can't control the weather…….
Thanks for all your help!

[BigDave]

You may want to push the FC a bit higher before the guests arrive. You're still losing chlorine at a pretty good rate and a bunch of swimmers will only increase the demand.
Pool Party Hint: If you make all the kids get out every 45 minutes for "adult swim", you'll get less pee in the pool and less chlorine demand.

[mary jo]

OK- I will do that.
I want to turn the heater back up- I usually keep the water temp at 84-86 for swimmers. Will I have to compensate for that by adding more CL?

[Watermom]

No. Shouldn't make any difference.