Adding CYA

[polyvue]

I would like to know what the acceptable chemical balances would be for my type of pool;

I have a gunite IG 14 x 28 approx 17500 gals:

My latest readings:

Chlorine 1
Ph 7.2
Alk 100
CH 160
CYA Just added and am waiting before testing.

My Ph, Alk, CH have dropped alittle from a few days ago. Any advice on what levels to achieve and maintain? Thanks much!

I can't believe there isn't a sticky on recommended levels (I looked but couldn't locate one)!

Unless there was a lot of water lost from your pool this week the drop in Calcium Hardness is probably due to testing variability.

Free Chlorine (FC) should be aligned to your target/actual CYA level. See this chart or target a minimum FC of 5% of CYA (SWG) or 8% of CYA (no SWG). For example, if you have added enough CYA to achieve a 50 PPM level, keep Free Chlorine at or above 2.5 (if pool is chlorinated by SWG or liquid chlorine automation), 4 PPM otherwise.

So, chlorine appears to be too low. pH is within acceptable range, TA is fine, CH could probably come up a bit. I like to use the Pool Calculator to determine the saturation index when trying to balance Alkalinity, calcium hardness, pH, salt etc. It will also display recommended levels if you enter the type of pool you have.