Saturation Index (SI), SWG, and Above Ground Pools

[16X32AG_Bob]

I have a 16x33 AG pool with deep end to 6 feet. Volume about 14,000 gallons. I have a Pool Pilot Digital with a SC48 Cell.

Current readings:
Temp: 80F
PH: 7.2
TA: 60
CH: 60
CYA: 30
Salt: 3200
FC: 4.5 - 5.0
CC: 0.5

TDS: ???

With a vinyl liner, I have never concerned myself with CH levels and only maintain TA to stabilize my PH. With my new SWCG, do I need to be concerned with maintaining a proper Saturation Index to preserve my SWG Cell?

With the above readings, my SI must be around a -1.5 (goal being 0.0 +/- 0.3). By the book, this makes my water more (much more) corrosive.

Should I focus on raising my CH, TA, both... or not worry as I have a vinyl liner?

Thanks - Bob

[Poolsean]

Hi Bob,

Thanks for selecting Pool Pilot.

With SCG systems, there is little concern with water chemistry in the corrosive side. With the SI in the scale forming side, there is a greater tenedency for calcium scale to build up on the blades, which is not good.
I would recommend increasing your CH to about 200 ppm.
Leave the TA where it is.

[16X32AG_Bob]

Thanks Sean,

An easy and uncomplicated adjustment. Just as pool care should be.

PS - Pool Pilot has been installed/working for just under a week now. While I have been taking daily CL measurements, I haven't had to add any CL and have been maintaining FC of 2 to 5 with swimmer loads of 3-4 kids 2-3 hrs/day. This Summer should go smoothly.