Sand in Cartridge Filter

[Rocketfish]

Hey everyone, whenever I open my filter canister to clean the cartridge filter, I see this layer of what looks like sand on top of the cartridge. There seems to be a little bit at the bottom of the canister as well. Do you guys think this is just normal debris from plants or trees and stuff? I'm concerned about where this might be coming from. I do vacuum up what appears to be dirt from time to time, but this sand is ALWAYS om there when I open the canister. Should I be concerned?



By the way, this filter seems super old, and I have no idea why a section of the top of it seems worn away. I just moved into this house a year ago and have no idea how they treated this filter.

 

[pooldv]

Mine is the same. I think my sand comes from a few places; blown in, waterfall rocks and the space between the coping and deck above the skimmers.

 

[Rocketfish]

Mine is the same. I think my sand comes from a few places; blown in, waterfall rocks and the space between the coping and deck above the skimmers.

Thanks for letting me know! I was afraid that maybe one of the lines was sucking sand from under the deck or something crazy like that. Good to know.