vsat88 said:BTW, my CYA says anything 16 or above is at shock level...
You really have to be careful of the information and instructions printed on pool products, it seems many of the companies have not changed what they print on the labels EVER, this includes instructions that tell you to do things like broadcast dichlor across the pool surface when adding to water, which may have been fine 50 years ago when almost all pools were plaster, but for the last 30-40 years vinyl pools have been very popular and broadcasting dichlor in them is a recipe for bleaching the liner, etc.
Ike