diatomaceous earth

  1. Brushman

    DE Leak, Solved, Tips

    I had a DE leak earlier this year. Small one. Seven year old Pentair FNS Plus. Filter elements all original. Several had small frame cracks. No obvious fabric rips, but since the cracking was getting worse and now with the leak, I just replaced them all. Figured problem solved. But within...
  2. iammikeb

    DE in sand filter not changing pressure

    I followed the guide, but even after two full cups of DE the pressure in my filter did not rise at all. The guide didn’t really indicate whether going beyond two cups was safe or not, so I have not tried any more than the two cups. Why am I not seeing any change in pressure after adding two...
  3. W

    DE is in the pool again

    New fns plus filter 48 from inyopools.com after first startup I had dirty de the color of mud throughout pool. cleaned and inspected all grids today no holes or tears. Manifold was t all the way down on manifold pipe so I greased up the o ring and it’s sitting better. recharged and now I have...
  4. C

    What DE should be used or avoided with DE filters?

    What Diatomaceous Earth (DE) should be used or avoided with DE filters? I haven't found very helpful information by googling similar questions. I tried to use food grade DE in my DE filter and quickly learned that I should probably stick to the DE that is labeled is sold for pool filtration...
  5. C

    DE filter - Basic questions

    I have a DE filter that looks more like a cartridge (Pentair ECDE60). Does anyone know how frequent the DE should be backwashed/filter grids cleaned? Everything I read says when the pressure gauge raises 10 PSI above normal, but my gauge is broken. My filter is so BASIC it doesn't have a...