White gritty scale

[PoolDoc]

The calcium carbonate bits are INCREASING both your TA and your CH, as they dissolve or break down. So it's not too surprising that you're finding your pool resists going below 120.

As the sand algae bits diminish, you should be able to lower the TA, and clean up the remnants.

[Wapak]

Hi Pooldoc,

my TA has finally dropped to 70-80ppm (this is the second day it has read that, was stuck at 120-130 for most of last week. I have been holding my PH between 7 and 6.8. it has generally taken 3/4 to one gallon of muratic acid, every other day to hold it there, the highest my ph has spiked was 7.2-7.5. my current chlorine is 1-2ppm.

The most progess i see on the scale coming off is usually right after a heavy swim day (kids jumping in and splashing all day). literally in my shallow seams and corners there will be little piles of it which are easy to vacuum.



I still brush every day, then vacuum the evening.

the lighter patches are diminishing for sure, specifically in my shallow end , but the real dark, thicker areas in my deep end dont seem to be budging much (these deep end patches have remained their same color, the darker brown, while the stuff that comes off is much lighter).

Just thought I would let you know an update. I havent used any pucks and will not!! I havent had to shock the pool, water has remained clear.

If you have any suggestions, or if you think I need to change something in my routine, please let me know.

I am a little concerned that the heavier stuff at the deep end does not seem to be 'chipping' off as quick.

Thank you again for your help and advice,

[PoolDoc]

No suggestions -- it sounds like you are doing exactly what you need, and getting the results you were seeking.

Just don't get impatient, and start scrubbing the liner, or lower the pH too far -- and I think it will be fine.