I just recently opened up my brand new gunite/plaster inground pool and have found this site extremely useful. This is my first time owning any type of pool and until I found TFP, I was somewhat terrified of trying to keep the water in good condition since I have zero experience.
I bought and received my TF-100 kit last week, and now feel like I am well on my way to complete control over this watery beast. (My only regret is not ordering the auto-mixer up front.)
Now, onto my question. The only uncertainty I really have at this point is how much water is actually in my pool. It's a standard Roman style pool, meaning it's basically rectangular, but with the corners rounded off to make a half circle on each end of the pool. The dimensions are 18' x 38' with the 38' foot length being from tip to tip of each half circle. The average depth is 5.5' (3' and 8')
Using the PoolMath calculator here, I found that a rectangular pool of these dimensions would have a volume of 28100 gal, while an oval pool would have 26300 gal. So if I were take the average of those two, it'd be just about 27200 gal. Does this estimate seem reasonable?
Please let me know if I left any needed info out for this. Thank you in advance for any help.
FC - 2.5
TC - 3.0
pH - 7.2
TA - 90
CYA - 10
CH - 175
Bor - 0
A little side info on why I'm not really sure about the pool volume. I tried raising TA from 80 to 100 over the weekend and thought I'd have it nailed with the amount I got from PoolMath. I added the exact amount of baking soda prescribed on Sat afternoon, and then tested on Sunday morning. The test showed that TA was still only at 90. I didn't think that I did anything wrong in PoolMath, so I figured the only variable that was probably wrong was my estimation of volume of my pool. I think I estimated at 23000 gal previously, since that's what my pool contractor had been telling all along. This is the reason my CYA and Borates are still really low, since I wanted to make sure I had the process down correctly with something that was more easily reversible than CYA or Borates first, and then add those two afterward.