Quote Originally Posted by PoolDoc View Post
Wow. This is the 2nd case like this, running right now. The first case didn't get good results till the chlorine levels exceeded 40 ppm, but they had lower CYA levels than you.

PLUS, you've got a concrete pool, so we don't need to worry about making a liner fade. OK, each gallon of 6% household bleach will add about 4.5 ppm to your pool (PF9 x 0.5lbs/Chlorine gas equiv per gallon of 6% bleach).

So, tomorrow evening (or tonight, if you can) add 11 gallons of plain 6% bleach (~50 ppm). If that doesn't have an effect, follow the next evening with 16 gallons. I wouldn't bother with K2006 chlorine testing -- you use up your FAS drops. Just test with OTO -- you should be dark orange after 30 seconds with OTO, AFTER you've added your doses. You might even get brownish, after the 2nd dose.

BUT . . . you need to KILL your algae, not wrestle with it!

And . . . if you are not already doing so, run your pump 24/7.
Sounds like a plan. I added 14 jugs of this bleach that I have (96oz each) in order to be equivalent to 11 gallons.

I'll test with OTO tomorrow sometime. Last test with it showed it to be a deep yellow so I'm sure it'll be orange tomorrow.

The filter is running 24/7 for last couple days and will continue.

I appreciate all your efforts in trying to get me squared away. This pool has my wife very depressed right now and getting it back to crystal clear will go a long way towards our household's happiness. Like they always say, "A happy wife equals a happy life."