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I didn't realize it was that easy to see. I have to say that the app and website (and people) are amazing.

No problem. This question was focused on calcium but I appreciate the emphasis on chlorine. CYA is now about 35 and I added a gallon of 10% bleach yesterday and a gallon of 12% bleach today. Since there is no pool cover and a ton of sun, I suspect that the chlorine is just burning off very...

I appreciate the help. Sorry I wasn't clear -- I didn't have enough socks to put all 9 pounds in at once, and, as you know, it takes time for the CYA to dissolve. The last 4 pounds (it comes in a 9 pound container) went in yesterday afternoon and looks like it is still dissolving this morning.

I will check everything a little later today. But my calculations also show a slightly negative CSI. It is a pebble pool, so it should be a lot more resistant to many issues just because there is a lot less plaster surface area interacting with the water. But I would like it to be 0 or higher...

Just added about 5 pounds of CYA and some chlorine. Will test later today to see what happened.

Does CYA damage the pool finish if left in contact with it? I can hang some fine mesh bags off the side and get it in more quickly, but the bags will be touching the pool finish.

Got it. Thanks -- I am definitely trying to keep the CSI on the slightly positive side, which is what prompted my question. Will get the CYA and chlorine in and see what happens.

Will do. That is today's job (they wanted me to wait a few days for chlorine). Thanks.

I have brand new pebble (mini Pebble, black). Fill was finished 4 days ago. TA is 80, pH is 7.8 (just added acid to go to 7.6) and calcium is 100. No chlorine or CYA yet. The recommendations are for pH in the 7.2-7.6 range depending on who you listen to. The plaster company wants it low...

Turns out that the O-ring was not seated properly. I closed the valves to prevent the water from draining out of the pool, unthreaded the connection, seated the O-ring, and re-threaded it. Opened the values back to normal. All good. Just posting in case somebody else has this issue.

Brand new startup with all new equipment. I got everything working, but there is a leak where the water goes into the Pentair heater. I have tried tightening the connection by hand, but it still leaks. Is there a tool to use? Or should I take the connection apart? Any suggestions appreciated.

Nevermind. I finally found it here. ABC's of Pool Water Chemistry - Trouble Free Pool

I am looking at the municipal water supply water parameters, and they are all in ppm. I was trying to see how they compare to the recommended units here, but I don't see units listed anywhere on the website or the app. Is TA the same as "Alkalinity (as CaCO3)" which is typically 105 ppm in my...

Thanks very much. One other question is chelation -- does anyone have any recommendations on what to use and when to add it? After pool is full? Any other recommendations? Our water quality report is here and a few select items in the screen capture below (far right column is us)...

We renovated an old pool (as part of a house renovation), and the plaster (black mini-pebble) is tomorrow (Sept 1). Is there any reason not to do a "traditional" startup instead of an acid startup? The builder doesn't care, and I will ask the plaster company. But honestly, I would prefer to...