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How did you get a cya reading of 10? 30 is the lowest my kit can detect.

I get mine usually from the local ACE Hardware, but I believe the Big Box stores carry it as well. Also, pool stores carry this strength too. As shown in the pic, the strength is 31.45% Hydrogen Chloride (Hydrochloric acid). The brand does not matter as long as it is 31.45% also known as 20...

Also, you may think that your pH is 8.2 because that may be the maximum detectable limit of your test. Your pH could actually be higher, and you require more acid than you think to bring it down. But I agree Acid Magic has a lower strength simply by it's advertising stating that you could poor...

When you opened your pool in March 31, what was your water temperature? My water temperature is up to 58F as of April 10th and I plan on opening my pool this weekend as the water temperature approaches 60 F. And I don’t anticipate that I will need to shock.

My pool is fully winterized in NJ but I open the cover at 2 corners every 6 or 7 days and drop in 2 circulation pumps to mix the 1.25 cups acid. The swg was removed during winterization and i used liquid chlorine when needed. I only check pH and chlorine weekly and other chemicals if I drain a...

😢 five years later?!? My pool is 9 months old and I was told 10 months to 1 year to fully cure and stop needing to make such frequent acid additions... You just told me there is no santa claus.....

For my 9 month old plaster pool I ended up buying a calibrated meter that i keep calibrated and check with standards and I don’t adjust my acid until the pH gets to 8.6 then I add 1.25 cups acid to take it down to 7.8 (about 11000 gallons in its current winterized state) which lasts for 6 days...

This might not be the popular opinion but I gave up on the drop test for pH because differentiating the colors was just to difficult for me. So I went with a quality digital pH meter which works flawlessly and is very accurate to 2 decimal places. Because I store the electrode in a pH 4 KCL...

You report CSI as -0.61 but when i plug your numbers in I get -0.51....I'm using the free "Pool Math" app maybe that's the difference.... To answer your question....The ideal range for csi is -0.3 to +0.3 but acceptable range extends up to -0.6 to + 0.6 (you just can't leave it outside the...

Yes it was mostly balanced except maybe for the 3 or 4 days I dropped the pH to ~7 in an attempt to lower the alkalinity.

Thanks for sharing your link and the subsequent Orenda link. I'm seeing lots of very similar thinking yet different opinions (if that's possible). Also, it's good to know that this is not something new that is only impacting me. In fact, it sounds like the issue is quite common in the...

Correct

I only added calcium on the dates I indicated above. On 10-22 was my 1st calcium addition hoping that if I further saturate the water with calcium it would stop leeching it. Prior to me adding any calcium the Calcium rose on its own from 200 to 500 ppm.....that I suspect was leeching

Also, I attributed the constant rising calcium to leeching from the plaster. So, I have been trying to keep CSI in the positive side in recent weeks. For me that is pH 8.1 to 8.4 pH........ = CSI 0.0 to 0.3 Latest Readings: Alkalinity=55, calcium hardness=550, cya=60, water temp = 42...

My pool was plastered 5-3-23 ...then filled. My Calcium results were as follows: 200 on 5/11 when 1st tested, 225 on 5/13, 325 on 6/13, 375 on 7/10, heavy rains and draining some water then refilling = 325 on 7/17, 400 on 8/7, 450 on 9/4, 500 on 10/20. For winterization purposes I then...

So you are saying that I should ignore the advice that some have given to just winterize my pool and forget about it until spring? Because if I follow that advice, that means no pH adjusting, no brushing, and no circulation creating a stagnant environment with very high pH not only close to the...

Soooo....Between pH 7.5 and pH 9.0, the bulk of the ions are present as bicarbonate however significantly more carbonate forms at higher pH and significantly less (due to carbon dioxide formation) at lower pH, so in typical swimming pool ranges, the carbon dioxide, bicarbonate, and carbonate are...

Thank you for participating in this exploratory exercise of mine. You have helped me expand my understanding of pool chemistry. One of my bottom-line takeaways of this exercise is that there is at least a comfort level with using csi as a vehicle for pool balance up to pH 8.3.... but beyond...

With the pool water is in the low 40’s approaching the 30’s I am not to concerned about algae. But you bring up a good point along the lines of….. pools without cya stabilization since they require lower pH for the chlorine to be effective…but pools that are stabilized with cya like mine …. A...

So what you are saying (with your supporting data) is that as long as pH is under 9 and the CSI conditions are within the desired range of -0.3 to +0.3.....then calcium carbonate should not precipitate and consequently should not form scale? If that is the case, why do you conclude with "I...

That is my dilemma. I am fine with testing and sharing to the community. I asked the question hoping I would not have to go where no man has gone before. I am willing to let my pH keep going up and keep testing to a point…… especially if I can find more insight on csi and Lsi for that matter...

Not sure if this question was to me but I can tell you that the bench top probes should last 1-3 years depending on the frequency of use and what is being tested…..at least that is what the Apera Tech service rep told me.

That makes a lot of sense. Thank you for that. Sounds like the key is to circulate at some level of regularity.

You just hit the nail on the head. That is exactly what I am trying to understand. Essentially…if I always adjust to stay in the csi range, does the pH have upper limits ?

But how can scale form if I stay in the csi range. Isn’t that one of the main purposes of following csi?

My pool and equipment are fully winterized . During the summer I had to add Muriatic acid every day to my new plaster pool when we kept the temperature in the high 80’s. Now that the temp is in the low 40’s, I add acid every 4 days which is a piece of cake considering what I am use to...

The reason for this question is that every 4 days my pH goes up to ~8.5 (8.7 if I let it go 5 days) and I adjust it back down to 8.0 with 1 cup of muriatic acid. I asked the questions with the numbers I provided because I am considering adjusting closer to those numbers as the temperature...

Happy to comply