Hello So, I know this is an old thread, but I have been reading it and found it VERY helpful.Moved from here
It appears based on this thread, that I have a similar problem that you had. It also appears you successfully dealt with it.
I started following TFP method in June (started with a FULL pool drain/refill). I have been successful in now keeping all of my chemicals in balance and my pool looks amazing!
EXCEPT - I have calcium scale that is tan in color(trapped dirt) in various area on the floor. This happened when I was NOT maintaining my pool properly over last winter.
FC = 0
PH = 8+
TA = 300
CH = 1600
CYA = 110
I am working on maintaining a negative CSI -.3 to loosen the scale and get rid of the dirt/calcium scale.
Based on what you posted, that actually might work after a few months. So, that gives me hope! So, it acuatlly worked for you to get rid of the scale? Do you have to Brush a ton each week? Or did the scale just start "falling out"?
You said to not maintain a Ph less than 7.2. Well, because of my High CH, I have to aim for 7.0 - 7.2 (but as high as 7.4). In order to get a CSI = -.3
Do you think aiming for ph = 7.0 is OK...... if my numbers:
FC = 12*
Ph = 7.0- 7.6
TA = 50-60
CH = 925
CYA = 50
*I also aim for a higher FC so I can go a few days without adding Chlorine and in some off chance I can "bleach" some of the dirt-stained calcium. Maybe wishful thinking....lol
Anyways...just wanted to thank you because you have given me some hope
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