I'm having trouble keeping my CYA levels up and my pH down. And want to know best way to add muriatic acid (see end of post).
I'm losing about 3ppm chlorine daily and would like to get my CYA up to at least 40-45 to sunscreen a bit more. I'm in southern CA and it's hot and sunny. On 6/7 I threw a couple of trichlor pucks in the feeder (and 2 more again today, ones from 6/7 are about half dissolved)) to try to keep my pH down and bring the CYA up. Not planning on using the pucks forever, but I have a few more left so figured I'd use them since I can benefit from their side effects.
I added muriatic on 6/15 and had pH at 7.3-7.4.
Im testing daily and my pH literally went from 7.5 on 6/18 Saturday to 8.2 on 6/19 Sunday so last night I added Chlorine and Muriatic and here were my numbers today:
Water Temp:80 Air temp high forecast 111 deg
FC full test = 7ppm CC=0
CYA = 25
CYA on 6/14 was 40. 6/5 was 35. 5/30 was 42.
I added water on 6/12 (filled for 2 hours)and last night 6/19 (filled for about 45 mins- maybe 1.5 inches filled) Does that account for the CYA loss?
And one last random question... Is it ok to add chlorine and muriatic acid in the same "session" or do I have to wait after adding one before adding the other. I usually walk chemicals around the pool when adding, but heard there is a difference between walking muriatic and adding to one spot by a return? Ok that's 2 more questions. 🙂
15000 gal in ground plaster pool (original late 60's plaster), Pentair FNS plus 48 sq ft DE filter, Pentair 1HP 1.65 sq ft pump. No heater. No pool sweep (yet! Any advice on a lesser expensive one?)