CYA - Define “disappear” please

[DeanP66]

The CYA test should really be done in bright sunlight with your back to the sun and the tester at your waist in the shadow of your body. I like to pour the solution to each line, look away and look back. If I see the dot, I pour to the next line, and so forth until I come to the line that I don't see the dot when I look back. Try not to stare at the dot for too long. Your mind will play tricks on you. Look away, look back.

 

[mgtfp]

I’m going to hold off on adding calcium chloride and see how the cal-hypo changes things over the next week or so.

With each ppm of chlorine you add to the pool with cal-hypo, you will also increase your CH by about 0.7ppm. Do, if you for example have to add about 4ppm worth of cal-hypo per day, then this will increase CH by about 2.8ppm. After a month that would add up to nearly 100ppm. If you only need 2ppm of chlorine per day, then it'll be about 50ppm of CH on a month. Just to give you a tough idea.

Low calcium is only really critical for plaster pools, for FG pools see Texas Splash's advice above.

What is critical for all pools is high CH, which will lead to ugly scaling. The water parameter that shows if scaling is an issue, is the CSI. You will also have to measure the water temperature and enter that into PoolMath, then it will calculate CSI for you. You don't want CSI above 0.3. With constant usage of cal-hypo you would eventually get there.

 

[mguzzy]

Hi Jess.
Here is some info on the CYA test in case you missed it, in particular the temp thang:

CYA Testing - Further Reading

www.troublefreepool.com

I like Dean's procedure for testing CYA.. just fill to each line. There is no reason to try and interpolate between them. And in fact its nice to read through all the things that can cause water testing errors. And then just keep that info in the back of your mind:

Water Testing Errors - Further Reading

www.troublefreepool.com

You are doing great! carry on!

 

[DeanP66]

I can't take credit for the CYA procedure. I copied it from someone on here. I think it was Maddie!!!

 

[mguzzy]

I can't take credit for the CYA procedure. I copied it from someone on here. I think it was Maddie!!!

You can take credit for relaying it... I got it from Marty.

 

[Apsuhead]

Great advice, I’m going to try the fill to the line trick for the CYA test next time. My new fiberglass pool was installed last November and i’ve gotten the hang of the testing with this site. I did slowly raise my CH to 200 and the dirty waterline has really decreased in appearing so often. I wipe it with a cloth and a magic eraser every so often, and it stays sparkling for a long time. My Warrior SE is great too, can’t imagine trying to keep the pool clean without it. The skimmer socks from Lowe’s have been great too, I just tried those recently.

 

[pypeke]

JessM, I have the same problem with my rural water in Southeastern Oklahoma. The water comes from Lake Eufuala (muddy) then goes to get cleaned up. Ha! Many times, I have turned the kitchen faucet on and brown water came out. Difficult to keep the pool chemicals in check.