I was lazy with setting up the pool this year. Had a little mustard the other week, didn't have time to work on it and just added a little polyquot before going on a week trip.
Huge mustard growth upon return! Low CYA, Low Borates and Low Salt. Would have been easier to adjust earlier!
Discrepancies between pool store and my TF test kit:
Reading store me
Salt 2200 3400
CYA 33 <20
I've been shocking based on the higher CYA reading.... trying to keep it at 19. Pool looks good, but I dropped from 19 to 12 overnight. That was just day one.
My salt reading was done with high FC levels. Does that through me off? Add salt light was on (manual says somewhere between 3000-4000 it comes on) Zodiac recommends 4000 for the SWG. I went ahead and added 1200 parts.... which could either take me to about 4300 or 4600. Manual says up to 5000, higher is corrosive.
My attempt to measure CYA was also done at high FC level. Any effect? I filled up the tube and could still see the disc, so I was less than 20. Why the discrepancy?
Big question is when to bring CYA back up and how much? I'd like to keep it low (whatever it is) until I'm sure the algae is gone so I don't have to shock to extreme levels. Is that a good plan, or should I start bringing it up now and just buy the extra bleach? Thanks!