For a few weeks now i have been getting sand accumulating on my pool bottom. I know because my Pool Rover Plus is collecting it in handfuls. I have never had this before and wonder if it indicates something wrong with my sand filter. I have had the same sand filter for almost 16 years and have never had trouble with it but it has been a long time.

Does this indicate a lack of enough sand in the filter, a blockage?

Thanks, Don