
Originally Posted by
CarlD
TC, FC, a bit low--Aim for 3ppm
pH: PERFECT
CH--a little low for a concrete pool--you want 200-400ppm. You can add calcium or chlorinate with Cal-hypo until calcium is in range. For a vinyl pool we don't worry about calcium until it hits 500ppm
Stabilizer(CYA): a tad low but OK. Since you are using a auto-chlorinator (I assume with tablets) that will come up on its own. 30-50 is the normal range. When it hits 50ppm, stop using tablets or powders and switch to bleach for chlorine.
TDS: A BS # pool stores like because it sounds important. When it hits 4000 you MAY need to pay attention to it, but probably not. Even then, unless you actually have a problem, TDS is totally irrelevant.
TA: Low. Add 1 lb of baking soda (That's right, Arm&Hammer) and wait 6-24 hours and measure again. Repeat until TA is in the 80-125 range (which you need). I prefer the 100-125 range myself. For vinyl, the upper limit is around 180ppm
New concrete pools tend to push pH up, and tri-chlor tablets are very acid and push it down. For now, they are IDEAL for your new pool.
Hope this helps.
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