Hopefully...minor clarity issue

[aylad]

If you're going to drain and refill to lower the CYA, do that first--it does not do much good to adjust all your other numbers to where you want them, and then mess them all up again when you refill. Do your draining first, then we can go from there to adjust the other stuff.

The sun and refilling will take care of lowering the chlorine, you don't have to do anything for that.

There are vinyl cleaners you can use for the skimmer walls--some people have had success with Magic Erasers, but I've just used a kitchen pot scrubber with a baking soda/water paste and it works fine for me.

And the best way to stay ahead of the chlorine draw is to add most of your chlorine at night--that way it spends all night working on the stuff in the water, and hopefully will reduce the chlorine load during the day.

Janet

[buki5]

Thank you all again for the help. Water is looking great! Tested with some additional help on the forum and CL is down to 10. keeping the pool open tomorrow to see how much it drops. Targeting a maintenance level of 8-10ppm due to the high CYA (well over 100) until I drain and fill. Would like to get some swim time in first.

[Watermom]

You are very welcome, Brian. Let us know if we can help again! Go swim and have fun!

[buki5]

Correction to my last post on the test readings.

Question at the bottom...
Tested CL tonight and I get 4.5, down from last nights 11. Here are all of the numbers.

FC- 4.5
CC- 0
TC- 4.5
PH- 7.4
TA- 190
CH- 140
CYA-150+

Sunny hot day, cover off. No swimmers, the dog did make it in and right out a couple of times but no duration of time in the water (He's also primarily an indoor dog).

As a reminder the numbers above have been pretty steady outside of the Chlorine. Last night CL measured 11

Question?
Does this drop in Chlorine, 6.5 points, seem reasonable? I tested once FAS-DPD then twice at varying multiples using DPD and the number seems correct.

If so, my plan is to add 2.5 gal of 6% bleach to get it back to a little over 10ppm.

Suggestions?

[Watermom]

Yes, on a really hot sunny day, you can easily lose that much chlorine. CYA of 150+? Wow. So, you decided not to do a partial drain but just live with it? You're gonna have a hard time keeping algae at bay, I'm afraid. Just look at today's levels. You're down to 4.5. Dropping that low is an invitation to algae. I hope I'm wrong, but I'm afraid you're gonna have a tough summer keeping cl levels up high enough to avoid an algae bloom. I think you better plan on taking the cl level up to 15 tonight instead of just 10 so maybe by evening tomorrow, you won't have dropped below 8.

[buki5]

Thanks Watermom.

One difference from today to tomorrow is that I will cover the pool (power cover). I just did a calc. and I show that adding 2.84 gal (2 bottles) would take me up to a little over 11.....

I can go more but want to be able to use the pool tomorrow (or any day for that matter) and am concerned about everyone swimming with too high a chlorine level. My wife wants me to talk to the "Experts"....I've been holding her at bay. Of course I don't want the algae to return either.

As for the CYA. I'll do a drain but want to get a few days in first. I do have a nice stockpile of bleach .

[Watermom]

I deleted your other post with the incorrect numbers. BTW -- when you realize soon after you make a post that you need to correct something, instead of posting another post, you can go in and EDIT it. Just click on the blue edit button in the lower right corner of the post. There is a time frame where you can do this, but I can't remember how long it is.

[buki5]

So, I think my basic question is what is my chlorine level range where everyone is able to swim and Algae is being held off (water clear)?

8-10 or 8-something higher? I believe I've seen on here at my CYA levels I need to stay at 8 or above to keep algae at bay? But how high is still safe for swimming?