New pool owner, see sig. Came with old PF 50 sand filter. Only know it's a PF 50 by the appearance and size. Label is illegible.
Wondering before/during opening if I should do anything special with the sand filter.
Should I open it up and look at the sand?
Hose flush if it looks nasty?
Replace sand either way?
No clue how long it's been since sand replacement. I do see a bit of sand on the equipment pad, but perhaps that's just from being winterized last fall.
Once it is running, is it OK to add small amounts of DE to a sand filter this old using http://www.troublefreepool.com/conte...-a-sand-filter ?