The only one that I have ever used advised 16 oz for my 29K gallon pool. I just squirted the contents over the surface of the pool, left the pump running overnight, and it was clear the next morning with the exception of the very deepest layer of the deep end. I repeated the 16 oz treatment on the deep end only, left the pump running, and by the next morning it was so crystal clear that the deep end actually looked shallow.

This is in a pool that I started up with new zeolite without backwashing first (a whole other story, posted elsewhere in the forum), and all that fine dust along with regular sand infusions from a faulty filter had mixed into a very muddy looking pool that I had contemplated draining, so it was an extreme circumstance. However, it is so crystal clear now that my daughter's friend who came over yesterday to swim actually asked if she could touch bottom in the deep end because it sparkles and looks shallow.
Janet