Question about adding DE to a sand filter

[jsw5620]

I read the how to and I followed to the instructions and added it until PSI increased by one. Came back a couple hours later and it had increased by 7 to 8 PSI so I backwashed again and it is back down to 14-15. This may be a stupid question, but the instructions said after the first time you will know how much to add so am I supposed to add that same amount every time I backwash or is the first time all I need? I had to buy it in a 25lb box and I didn't know if I was to keep adding it every time until I am out or how much to stop at. Thanks in advance for the replies!

 

[waste]

Don't sweat the question

I add it until the psi stops having the HUGE rise.


The amount you need to add should be constant - all you're doing is coating the sand with DE (the amount depends on the size of your filter and the flow from your pump).

As such, once you know that you need "X" amount of DE - it will stay constant

 

[jsw5620]

Thanks for the reply! What I guess I should've asked was do I add DE to the sand filter every time I backwash from here on out or do you just add it a couple of times and never again?

 

[Jamison04]

Yes you will had to add it everytime you backwash as that flushes out all the dirt and debris that is caught up in the sand itself including the DE.