High Chlorine but still some yellow Algae on walls

[PoolDoc]

To manage a pool with a CYA of 150, you'll *need* the K-2006; it's not optional (test kit page in sig). Read the "Best Guess" page, which explains. Without the K-2006 you won't be able to control your chlorine levels.

If would, please enter your pool data here:

Pool Chart Entry Form
Pool Chart Results

Operationally, high CYA can be a benefit IF you can control chlorine properly. With a CYA=150, you can add chlorine 1x per week, dosing to 15 - 20 ppm FC, and then letting it fall all week. That's about as easy as it gets!