New pool owner here, and as title suggests, I'm battling a constant pH and CH rising. Minipebble plaster went in June 22, and was filled immediately after. Calcium hardness is already up to 600ppm and pH is constantly rising, and reached 8.0 within 2 or 3 days of not paying attention last week. I added enough acid to bring it back down to 7.4, but it shoots back up to 7.6 within 24 hours. I've been going through this cycle for the past week or so. Unfortunately, I only recently bought a Taylor K-2006 kit last week and recording measurements, so the only previous measurement I have is at Leslie's. I know pool stores are notorious for giving inaccurate values, but this is the only comparison I have.
Is it normal to go through this pH and CH rising so quickly in the first month? I'm aware the water chemistry can be unstable as the plaster cures, especially the first month. I did use 2 lbs of Cal-Hypo shock a week ago, but didn't think 2 lbs is enough to bump up CH to 600 ppm in a 20k gallon pool? Also, in terms of aeration, we do have a 4 sheer descent waterfalls and a standard spa spillway, but the sheer descents are rarely turned on.
Other than the rising pH and CH, pool water looks great and is crystal clear.
Any suggestions going forward? Thanks!
From Leslie's on 7/13:
FC - 5ppm
CC - 0.2
pH - 7.4
TA - 90
CH - 260
CYA - 60
Here's my values from today:
FC - 9ppm (I know this is high, trying to get my in-line feeder dialed in)
CC - 0.5 (possibly lower, used .5ppm increments)
pH - 7.6
TA - 120
CH - 600
CYA - 60
Is it normal to go through this pH and CH rising so quickly in the first month? I'm aware the water chemistry can be unstable as the plaster cures, especially the first month. I did use 2 lbs of Cal-Hypo shock a week ago, but didn't think 2 lbs is enough to bump up CH to 600 ppm in a 20k gallon pool? Also, in terms of aeration, we do have a 4 sheer descent waterfalls and a standard spa spillway, but the sheer descents are rarely turned on.
Other than the rising pH and CH, pool water looks great and is crystal clear.
Any suggestions going forward? Thanks!
From Leslie's on 7/13:
FC - 5ppm
CC - 0.2
pH - 7.4
TA - 90
CH - 260
CYA - 60
Here's my values from today:
FC - 9ppm (I know this is high, trying to get my in-line feeder dialed in)
CC - 0.5 (possibly lower, used .5ppm increments)
pH - 7.6
TA - 120
CH - 600
CYA - 60