At 0845 added 35 oz MA (I use 31.45%). In Pool Math, I entered pH 8.2 and goal pH 7.5.
At 1030 pH >8.2, TA 100, CH 100. Added 35 oz MA.
At 1230 pH >8.2. Added 40 oz MA.
After this, I then checked at 1315:
pH 7.8. Added 17 oz MA. Turned up the pump from 1500 RPM to 2200 RPM to aid in mixing chemicals. Netted the top and bottom of some minor debris (i.e. leaves, pine needles) to also aid in chemical mixing. Rechecked sooner than your (Allen) recommended min. 1 hr. and checked at 1330 as I needed to leave quickly for an MD appt. When checked, found pH at 7.2. No more chemicals added.
I was informed the Burkett's pool tech would be coming sometime shortly after 1500. That threw a wrench in things b/c I knew I would not be home to meet with him and to keep him from putting in any further chemicals until I got home so we could discuss the matter. Had my MD appt. Left at 1500. Rushed home. Home at 1530. Saw pool tech walking back to his truck w/ his rubber gloves on, 5 gal bucket, and gal of MA. Thought great, how much MA did he add. He informed me when he tested he got pH 7.8, TA 70, CH 80 (I don't know what the heck he was using to come up w/ these numbers. In fact pretty shocked they were quite off from my results via my TF 100, Speedstir, and K-1000 Test Kit). If I recall correctly, he told me he added about 1 qt. of MA, I can't remember how much CA, and a metal sequestrant. Sidenote, over the summer I had my tap water tested for metals at my local pool shop and it showed zero. But, when I removed the socks that were on the end of the fill hoses, they were slightly brown. I asked him if he at least broadcast the CA and he stated that is what he always does. Hearing that, I went to the back and started brushing the pool promptly, which was probably the 4th time of brushing it today (Day 1).
Let things settle, did some other things, and tested again w/ these results:
pH 7.0
TA 80
CH 200
temp = 61 degrees
Per Pool Math, using 19000 gal, FC 0.5, CYA 0, Salt 0, Borate 0, my CSI is -0.81. Looks like this tech threw me to the other end of the CSI spectrum. Now I am sweating that I think things are too corrosive.
TFP'ers, please chime in. Should I run out to Walmart, HD, Lowes, or Target and pickup some borax? I don't have enough on hand to counter this. And raising my TA to the top of the recommended range for Day 1-6 per the Wet Edge 28 Day Start Up instructions (TA 80-100) doesn't change my CSI enough. In order to significantly change it to get just within the balanced water range, I can keep my TA at 80 and raise my pH to 7.5. Thoughts? Opinions?