Wall algae with CYA=75 ppm?

1. Put your pump on LOW speed.
2. Set your timer to run 24/7
3. Add 5 gallons of PLAIN 8% bleach OR 5 pounds of 68% cal hypo daily . . . ASAP
4. Test with the OTO kit; stop adding chlorine when you read orange tinted yellow; repeat when chlorine drops back to DARK yellow.
5. Brush the algae spots AFTER adding the chlorine.