First time backwashing. I think I added too much DE, maybe now too little?

[Squatting Hen]

I have a Pentair FNS Plus 60. I decided to try backwashing myself for the first time, as it seemed pretty easy. I had some DE and a blue (supposedly) 1lb DE scoop from Leslie’s. Initially I couldn’t find the scoop, so I ordered this one https://a.co/d/0xIm0Wg which says it holds 2 lb of substance.

New scoop comes in and it’s the same size as the 1lb one from Leslie’s…..which means I added twice the amount of DE that I should have.

I am confused on what is the right amount? Is the poolzilla scoop really 2 pounds of DE? If so, it’s the same as Leslie’s 1 pound scoop. Also, how many pounds should I really add after backwashing? The filter says 6lb, and I read backwashing needs 80%. Should I backwash again since it seems like I added twice the amount?

 

[proavia]

The label on the filter should indicate the correct amount of DE used for a full teardown and clean and also for a backwash to recharge the filter.
After a backwash, the amount of DE used to recharge the filter is usually about 80% that used for a full teardown and clean.

I wouldn't trust what the scoop manufacturer states the weight of a full scoop is. I'd use a scale and weigh out the recharge amount - not just the weigh a full scoop holds. Here's a recent post about DE scoops and weight.

Question about how much DE to add

Good day everyone. I cleaned my filter today (Pentair FNS 48 sqft) and recharged my filter with approx 7.5 lbs DE according to the chart on the DE box and not the 4.8 lbs directed by the label on my filter itself. Whoops. I added 11 scoops of DE using a blue DE scoop. I calibrated it before as...

www.troublefreepool.com

 

[wireform]

I'd say that's incorrect and it's a 1 lb scoop. You need 6 pounds for the refill.
Check out this Amazon review of Poolzilla 2 Pack DE|Chemical Scooper, Measures 6" x 5.4", Can Hold (1 Liter/2 Lbs) of Substance

 

[Squatting Hen]

This is from the filter. So one blue scoop should be about 1 lb of DE. Same with that poolzilla scoop lined previously. I thought I read a 1 lb coffee can was 1 lb DE, but my filter seems to be confusing on that pat where is says that OR 1/2 lb weight of DE.

 

[proavia]

This is from the filter. So one blue scoop should be about 1 lb of DE. Same with that poolzilla scoop lined previously. I thought I read a 1 lb coffee can was 1 lb DE, but my filter seems to be confusing on that pat where is says that OR 1/2 lb weight of DE.

See post #2 and the thread linked there.

 

[dereksanders]

Seriously, use a scale that has tare function. Nothing fancy, just a food scale will suffice.