Quote Originally Posted by chem geek View Post
Alex,

If you lower your TA, then you make the water more corrosive in terms of gunite/plaster/grout so you would need to compensate by increasing Calcium Hardness (CH) or keeping the pH higher or both. However, you generally don't run into problems with corrosion (or scaling, in the other direction) until the saturation index is quite a bit out of whack. Nevertheless, if you post a full set of numbers, especially for your pH, CH, CYA, salt level or TDS, current TA, and temperature, then I can give you an idea of where you are currently at and what you can do after lowering the TA.

Richard
Thanks Richard,

Haven't tested the water since I closed it but I can tell you that the numbers usually were as follows:

FC = 2-5 (I rarely shock)
CC = 0
CYA = 40
Salt level or TDS = ? (never tested for this)
TA = 100 - 120 (used to be 90 and I raised it to 120...After that it lowers when I add the acid but then creeps up)
PH = 7.6 - 8.0 (added acid once a week...PH always creeped up but the upswing was quicker after I increased the TA)
CH = 350
Water temp = 75-90 degrees depending on month

Other info that might be of use: I only use bleach and I don't have a heater.

Thanks again