New IGP (vinyl) 22.5K, 48sqft DE filter, autopilot SC60
I have been running the the SWG since Monday evening (500lbs of salt added Monday noon - all disolved) Dig220 indicates 3200
Filter pressure 12psi
Could not measure any appreciable Cl level all week running pump and SWG almost 24hr/day
Monday: Power Level 1 @ 50% Cl = 0
Tuesday: Power Level 2 @ 50% Cl = 0
Wed: Boost 24hr Cl = 0.3
Thurs: Power Level 2 @ 50%
Had about 0.3 Cl last night according to a pentair drop test kit the installer left (I will be ording the TFP kit tonight).
Then Put 2 jugs or 6% bleach = 348oz about 9PM
Using the bleachCalculator should have raised Cl to 7.2
Took a sample to the pool store this with the following results at 8AM:
TA = 110
pH = 7.6 (my drop test indicated 8.2)
CYN = 0
TH = 130
TC = 6.3
FC = 6.3
Just tested water again (9.5 hours later) with test kit - ALMOST ZERO CL
I just broadcast 4lbs of cynaric acid (most sitting on bottom) - may need a couple more lbs
A couple of questions:
Would zero stabilizer cause such a rapid Cl burn off by the sun?
Would the loss of some FC overnight (expected 7.2, actual 6.3) indicate algae?
Is the next step to bleach it again once the CYN level is raised?
Any suggestions would be greatly appreciated