The last week or so, at times I have tiny blue flakes / crystals coming out of the return jets. Its most noticable in the spa since its shallow and very white. I vacuum the spa to where there isnt a spec of dirt. Turn on the returns for a few minutes. And the little guys collect right under them.
They are about the size of a pencil point (sometimes slightly larger) and very hard. I can break them up and they almost turn into powder. So maybe its some chemical clumping together and getting through the filter?
It doesnt seem like a huge deal but Im really curious to know what it might be.
About 2-3 weeks ago I replaced the filter grids because of tears. Up until that point I had a horrible metal problem. Thats been completely gone since the new grids were installed.
FC - 4
CC - 0
PH - 7.2
TA - 100
CYA - 30
Thanks a lot