Precipitate?

[KfenTx]

Our (new) pool has been running for about a week now and we have a precipitate in it that I'm wondering about.

Is this normal for a week old pool? Based on another very recent thread, I'm thinking I need to get the TA down?

Thanks all!!

FC: 5
CC: 0.5
TA: 220
CH: 275
CYA: 60 (just added a little after this result)
Salt: 2400ppm (also just added some after this)
*I errored on the side of too little CYA and salt to get things started, didn't want to overshoot

 

[Rancho Cost-a-Lotta]

Have you tried to collect any of the substance? You may be able to catch some in a net. Put it in a glass or jar and drop some vinegar or muriatic acid on it. If it fizzes, it's calcium scale. If it is scale, looking at your pH and TA (and high CSI), the scale is being formed in your salt cell during the generation process.

You can mitigate scaling in the cell by lowering TA to the "ideal" recommended range for you pool.

High TA levels will pull up pH quickly. Each time you add acid to lower pH, TA drops a bit. Pool Math will tell you how much. This process will eventually lower TA, but it could take some time and lots of acid. You can accelerate pH rise through aeration as described in the article (lowering TA). When I need to aerate, I set my returns to spa mode and pull water from the pool. The combination of bubbles in the spa and heavy spillover speed up pH rise quickly.

If your fill water is high in TA (which I suspect it is since you just filled), you will have a bit of a battle on your hands as you add higher TA top off water.

 

[KfenTx]

Have you tried to collect any of the substance? You may be able to catch some in a net. Put it in a glass or jar and drop some vinegar or muriatic acid on it. If it fizzes, it's calcium scale. If it is scale, looking at your pH and TA (and high CSI), the scale is being formed in your salt cell during the generation process.

You can mitigate scaling in the cell by lowering TA to the "ideal" recommended range for you pool.

High TA levels will pull up pH quickly. Each time you add acid to lower pH, TA drops a bit. Pool Math will tell you how much. This process will eventually lower TA, but it could take some time and lots of acid. You can accelerate pH rise through aeration as described in the article (lowering TA). When I need to aerate, I set my returns to spa mode and pull water from the pool. The combination of bubbles in the spa and heavy spillover speed up pH rise quickly.

If your fill water is high in TA (which I suspect it is since you just filled), you will have a bit of a battle on your hands as you add higher TA top off water.

Thanks for the details! That's pretty much the conclusion I came to without testing but great to hear I can check to confirm.

I did add some MA and got the pH down a bit so i'll keep working on that and see what happens. Yes, incredibly hard water here! Tap water was 230 when I tested it a couple months ago.