I just installed a new DE Grid for my Pentair FNS Plus 36" filter. I initially put 5 scoops od DE (store bought DE Scoop) in, and I have backwashed about 4 times. Should I put in 7 Scoops to make up what I should have put in.
Hi Trusso,
Yes I would suggest 7 scoops to make up for what was not originally added, from here on out after backwashing add 5 scoops.
Thank You
Patrick