Sand Filter (sand replaced last season)
Been using: Leslie Shock and 3" pucks
I'm ready to switch. I've been having more and more trouble with my pool the last few years and this year is the worst. I opened my pool last week as always:
1) Took off the safety cover- yup, it's a bog.
2) Adjusted the PH to 7.4
3) Added 4 lbs of granular shock (FC somewhere over 5 on the tester)
4) Ran pump 24/7
5) Backwashed 2X / day
Pool should be clearing up right? Nope- it's actually getting worse.
So I go to the pool store and get the water tested.
They tell me the water is fine but I need to add alkalinity, hardener and algaecide.
So I ask, shouldn't the chlorine be killing the algae? It's been at a high shock level for almost a week. They said ya, but the algaecide just does a better job. I understand the alkalinity up but hardener? I have a vinyl liner with no metal railings - why do I need to add hardener? Answer- you still need to keep the calcium level right.
Not satisfied with the answers I got, I started sniffing around and landed here.
So from what I've read, it sounds to me like:
1) My CYA is VERY high and that's inhibiting the FC from doing it's job- killing the algae. I should cut my CYA in half- so that means draining / replacing a good bit of water from the pool.
2) My Alkalinity is low- baking soda to the tune of 27 lbs for my 30K pool.
3) I need to add a #$%# load of bleach and keep the FC levels somewhere between 8-13 (*based on the pool cal for current CYA level but this will change)
I have the leslie pro test kit- it's 4 years old but I replace the regents every year. How do I measure FC past 5ppm? That's as high as the titration scale goes?
Is there anything that I'm missing? Won't FC that high eat away at my liner? I'm scared!!!
Thanks in advance for the help,
-P in the A