I just switched to a hayward sand filter about 1 month ago. I am not getting some sand in my pool. In the first few weeks everything was great up until last week or so. Now I cant get rid of some sand in the pool. I vacuum it out but it comes back. The pressure really hasnt risen on the pump so I didnt back wash. So I thought maybe that was causing it and my pressure gauge just wanst working right. So I backwashed but that didnt seem to help.

Maybe I am backwashing wrong. The way I did it was
  1. turn the pump off.
  2. turn the valve to Backwash
  3. turn the pump on and let run for a minute
  4. turn pump off
  5. change valve to rise
  6. turn pump on for a minute
  7. turn pump off
  8. change valve to filter
  9. turn pump back on.
Any ideas?

Thanks,
Frank