First I’d like to say this is an awesome forum and it has helped me maintain an awesome pool so far…I haven’t posted any questions yet because I always find answers by simply searching. But today I couldn’t really find anything that fit exactly.
I live in League city, TX (Houston). I have an 8 month old diamond brite plaster pool that is aprox 15,000 gallons. I have all Pentair equipment with an IC 20 swg chlorinator. Since the summer started I have been running it at 100%. We usually swim in it on the weekends for about 4 to 6 hours total.
I have the TF-100 test kit and test my pool on a weekly basis. Typically PH is high at about 8 to 8.2 ( new plaster I assume) but most measurements are in line so I’ve just been adding about a pint of acid per week and that’ll bring it in line. Alkalinity is about 80 every test and as I add acid it seems to fall back to about 60 to 70. I have a spa that’s spills over into the pool, which can also be contributing to the weekly jump in ph.
FC levels are typically between 4 and 6 which I have considered normal with CYA level of 50 to 60, which I’m thinking I may need to bring to 70-80. Once in a while I’ll get a CC test of .5, which has not bothered me.
Calcium hardness is typically between 210 and 250 and I have not worried about that.
Water temperature has been hovering at about 86 to 90 degrees as it’s been getting really hot here. Oh, and we've had lots of rain lately.
I run my pool 12 hour per day with a pump RPM of about 2000. I left it at 2400 all last week by mistake.
For the last three tests my FC has been only 3 ppm with no CC’s even though I have the chlorinator at 100%....Soooo my question is: Should I be worried? Should I add liquid chlorine to boost it up? Should I raise my CYA level? The water looks AWESOME, super clear, but I want to avoid a problem before it starts…
Her are today’s test results, I’ve already added some acid to bring PH down…
CC – 0
PH – 8.2
T/A – 70
CH – 220
CYA – 50
Temp – 87 degrees
Also, I have added CYA in powered form before by dumping it in the skimmers, is that the best way or will it hurt my equipment?
Thanks in advance for your help,