My brother put our pool in in 2006 when he lived here - we moved here in 2008. Nothing has ever been done with the sand filter - nothing added, nothing replaced, etc.... I have all the manuals for all the equipment, and can I just say that the manual for the sand filter is less than helpful?
It's a Hayward Swim Pro.
Should we be adding sand or replacing it or anything? How high should the sand be inside? It "looks" like it's about 1/2 way full.
Following are pictures of the filter and an attempt at the insides. Can anyone see anything wrong or want to tell me what I should do with it (if anything)?