Split off of I just added 20 Mule Borax to my pool a week ago. It was fine where it was originally, but has now spawned a whole new discussion that is off topic for the old location. JasonLion
You want to keep enough stabilizer to protect your chlorine levels. 10ppm of stabilizer will protect 1.5 ppm of cl2 from uv destruction. The higher the stabilizer levels, the greater algae prevention you will have. It has similar properties as Borate.
Here is a great article about using Borates