I would like to try Adding DE to my Sand Filter.
I read the Instructions in Pool School.
But there is a line in there, I don't quite understand.
"The very first time you do this, you should keep an eye on the filter pressure for the next 24 hours or so. The improved filtering may quickly catch a lot of very fine particles and send the filter pressure up rapidly."
So how high does it send the PSI up? Am I suppose to know what a dangerous level of raising it should be? And does the Pressure go down afterward?
Thanks in advance.