cleaning pool filter

[cleland418]

I have a sand filter. Thanks for your help

[sevver]

What you need to do then is backwash it, until the water coming out is clear. This will get any algae that is sitting on top of the sand in the filter to get flushed out of it. Good luck on the opening, it can be a pain sometimes. And welcome to the forum, this place is a gold mine.

[cleland418]

thanks very much. I thought I had to buy something to put in it. lol.

[dkdog68]

i have a question along the same lines...how often should i backwash? also at what pump pressure is a good indication that you need to backwash? i have a hayword sand filter (100 lbs) with a 1 hp pump. my pressure right now is about 15 to 17 psi.

[blue_steel]

When clean, my 1.5 HP pump and sand filter runs at 5 to 7 PSI. I backwash when the PSI hits 12 PSI.

[dkdog68]

Okay...thanks for the advice.