Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: How often to Backwash?

  1. Back To Top    #1

    Join Date
    Jun 2016

    How often to Backwash?

    How often should I be backwashing and rinsing?

    So, last week I noticed some "brown" stuff coming out of the pump and into the pool when the pump was just turned on. It lasted a minute or two and then the brown stuff quit coming out and the water was clear coming out of the pump. Like an idiot, I ignored it, went on family vacation, and now when I came home a week later, the pool had a lot of brown stuff on the bottom. I did a backwash cycle and a TON of brown came out of the pump. I did three backwash/rinse cycles and now the water is clear coming out of the pump.

    Couple dumb newbie questions.

    1. Does the sand pump actually filter the water? And if so, does it need to be rinsed to remove what it's filtering?
    2. What now with the pool? Do I just run the pump and hope the brown stuff gets filtered out again?
    3. Is the pool safe to swim in like this? Chlorine level was at zero when I got home (dang it), so I wasn't running the pump long enough while I was away. I added chlorine and it's at 3 now. Aside from PH being a little high, all other numbers are fine.



    22' round 12,000 gal Intex AG pool. SWG Model ECO 20110 2650 GPH Salt System. TF-100 test kit.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: How often to Backwash?

    1. The sand filter is what filters the water (the pump just moves the water). The pump basket will catch larger debris. You should backwash the filter when the pressure rises 20-25% over the clean pressure.

    2. What are your test results? Sounds like you might need to follow the ShockLevelAndMAINTAIN Process.

    3. If you can see the bottom of the pool and the FC level is between the minimum and the shock level for your CYA (see the FC/CYA Chart), then it is safe. Given the FC drop to 0, I highly suspect the SLAM is needed.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts