I opened my pool a few weeks ago with my 10 yr old Jacuzzi DE filter & got the water looking beautiful! The next day I noticed these sand like deposits all over the bottom so I vacuumed a few more times...it came back every time! I was told this was probably the DE kickIng back from the filter. My grids we're also 10 yrs old....so I bought a new Hayward ec50 DE. After vacuuming twice I still see these sandlike deposits, although not as much as before UGH!! The pool store guy said it could be white algae...what??? My kids just want to finally to get in their pool!! Please help!!
Above ground pool, Hayward EC50 DE filter