I just remodeled my in-ground plaster pool and am still within the one month startup period (19 days). The contractor handled the initial startup (3 days) and I been brushing twice daily and handling the chemicals for the last 16 days. I been using Hasa Sani-Clor / HASAChlor (Sodium Hypochlorite) and Hasa Muriatic Acid (Hydrochloric Acid) to balance the FC and pH. I added Natural Chemistry Liquid Swimming Pool Stabilizer and Conditioner to raise the CYA to about 35. I been checking and adjusting the chemistry everyday per the directions supplied by the contractor (National Pool Council Start-up Procedures). Here is the current pool chemistry as of today (Taylor K-2006C):
FC = 2.8
CC = 3.0
pH = 7.7
TA = 80
CH = 240
CYA = 35
Borates = N/A
My current approach is to use liquid chlorine as my primary oxidizer while keeping the CYA level low. But the high alkalinity of the liquid chlorine is making it hard for me to keep my pool balanced.
Here is what I am seeing:
- Add Liquid Chlorine
- pH Increases
- Add Muriatic Acid
- pH Decreases but
- Total Alkalinity also decreases
- Repeat 1 through 5 until Total Alkalinity drops below 80
- Add Baking Soda to raise Total Alkalinity to within normal range but
- Total Calcium Hardness increases
- No easy way to reduce total calcium hardness increase.
CH will continue to climb unless I find a way to break this cycle.
I am having to add baking soda every few days to keep the TA in the normal range so am seeing the CH continue to climb. I realize that CH is well within range at the moment but CH seems to jump at a rate of 20 ppm every time I added baking soda.
Is this normal? Any suggestions?
By the way, prior to the remodel, I had a pool service handle the chemicals but wanted to do it myself since I had a fresh pool to start with.