Bleach not staying in pool?

[PhantomAndy]

Anytime I get any kind of algae problem that 10-15ppm of Cl doesn't permanently fix - I just toss a quart of Polyquat in the pool.

The past two years - I have had a 'whispy green' algae that starts to form right in the middle of the year. Shocking never gets rid of it - nor does vacuuming. The polyquat does the trick everytime.

Granted - it's a little expensive @ $20+ a quart - but worth it in terms of time saved.

[h20man]

I checked my CYA & it was @ 7!! Didn't think just warm water can eat up CL as fast as it's been going...pool is @ 85 deg.
FC 0.1
TC 0.2
CC 0.1
PH 7.3
CYA 7
TA 178 - high
CALC 385 - high

dumped in stabalizer & re bleached tonight w/ 2 gallons 10% , we'll see tomorrow

my next question is w/ my ALK & CALC being so high , how can I add muriatic acid w/o dropping my PH too low, maybe I should stay put?
thanks

[KurtV]

H2O,

Your alkalinity is high but not crazy high and your CH is in the acceptable range (at least according to most of those "recommended levels" tables you see). I wouldn't worry about either for now.

Something is still eating your chlorine and really, no matter what it is, the cheapest and most effective recipe for fixing it is probably more chlorine. Dose up the chlorine to shock level as you're doing (10 or 15 ppm will probably work with your low CYA level), test frequently (like 3 times a day if you can), and keep adding chlorine as needed to bring it back up to your shock level. Once it holds free chlorine overnight you should be on the downhill side of this.

Good luck.