Steps - Switching from Baquacil to Chlorine

[aylad]

Hi Gene,

You can raise the pH if you want to, but I wouldn't worry about anything other than chlorine for now, provided the pH is over 7.0. Your pool isn't over the "hump" yet, as evidenced by the CC reading--that's the chlorine in the water that's trying to kill off the Baq. As you keep your free chlorine levels up, the CC will gradually decrease as the chlorine burns it all off. When the CC is zero, the pool is clear, and you're not losing more than 1 ppm of chlorine when testing at sundown and again at sunup, THEN it's time to change out your sand.

Janet

[GeneNTN]

Saturday, May 28, 2011

Janet,
Thank you for your welcomed response! However, I have tell a story on myself – the FC & CC levels I last reported were in ERROR! I mistakenly multiplied the # of drops by the 10 ml water sample vs the 0.2 ppm, so the real numbers were FC = 0.4 ppm and the CC = 0.2 ppm. However, I did not add any dosages last evening – which may be good in some respect (except for the time loss to rid the pool of Baquacil).

Test results this a.m.
Water temp = 67 deg.
FC = 0 ppm
CC = 1.0 ppm
pH = 7.4

With the pH now reading OK (and I’m not quite sure why?) and CC = 1 ppm, using Table A (from the Taylor’s Testing & Treatment Guide), I’ve added 3 gallons of chlorine bleach (6%). My guess is that this should raise TC ~ 9 ppm – and disregarding the negative effects of the sub light / UV rays today, this will reduce the 1 ppm CC without leaving a residual high level of FC. My plans are to retest in 6-8 hrs to see how my theory is working.

Additionally, I also appreciate your recommendations as to when to change the filter sand, etc.

As always – “thank you” for taking your time to read and answer my concerns!

Gene

Correction: I added 3 jugs at 1.42 gallon each for a total of 4.26 gallons of bleach (6%). Thank you for your understanding! -Gene