Quick noobie question about first time sand filter use

May 30, 2015
49
Southern Illinois
I'm completely new to sand filters and finally upgraded to the intex 3000 gallon sand filter. My question is, I am performing the first routine backwash and there is quite a lot of sand in the sediment window. In the video is showed no sand in there, is this a problem? Should I backwash until the sand is clear?
 
My PSI started out at 10psi, which is right on the border between green and yellow. I backwashed for 6 minutes and then rinsed for 4 minutes and it is still at 10psi. Is this high? In the instructional video they said when it got to that point I should backwash but it started there so not sure if there is something wrong with the filter or not.
 
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