I would like to use up my bags of shock. They are 1 pound each. How much should I use to shock the pool up to 20 ppm? A full bag? Once they are used up, I will be switching to bleach. I posted more about that in the chlorination forum.

Also, I can't point my return up. On the Intex pool, the return has a cap on it, and it is low into the water.