Quote Originally Posted by Watermom View Post
3 gallons isn't enough. With a CYA of 60, you need to shock the pool up to 20ppm and try and hold it there. In your pool, each gallon (4 quarts) of 6% bleach will add about 3.5ppm of chlorine. Test at least twice per day and each time add enough bleach to get back up to 20. Run the pump 24/7 and backwash whenever the filter pressure rises 5-10psi over clean filter pressure.

BTW -- Welcome to the Pool Forum!
I actually added 8 X 3 quart bottles = 6 gallons of 6% bleach. 6 X 3.5 = 21ppm. The cheapo test kit that I have only reads to 10 PPM Chlorine level, but it is at least 10.
I brushed down the pool and will check again in the morning.

Any other suggestions? It has a Hayward sand filter (300 lbs of sand) and I think that it needs 'help'. Should I try adding DE to filter the dead algae? I will try vacuming to waste the worst part of the algae in the morning.