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Thread: DE filter cycles are much longer following replastering last this common?

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    Join Date
    Jul 2014
    Berks County, PA

    DE filter cycles are much longer following replastering last this common?


    I'm suspecting that, since the old plaster was in a pretty deplorable state, every time I brushed or vacuumed I was probably sucking in plaster debris. I am thinking that the plaster was constantly breaking down (also it was a constant battle with algae attacking all the pock-marked and worn areas on the bottom - it sort of looked like a coral reef down there). I experienced filter pressure increases nearly every 2 weeks or so, but so far this season with the new plaster the cycles are much longer. I cleaned the filter a month ago (I never just backwash....rather I take everything apart and hose off the grids, clean out the tank, pump strainer, etc.) and I'm still at the same pressure that I started with after adding new DE.

    What is the 'average' filter cycle length - if there even is such a thing? I do think that what I was experiencing with the old plaster - that of having to clean the filter every few weeks - was probably a bit excessive. Is it possible that now I might only need to backwash following a pressure increase and then take the filter apart every few cycles instead of at every DE change as I have been used to doing? Anyway, I'm loving the reduced level of maintenance! Plus the water seems so much cleaner and fresher (well, for one thing it was a fresh fill only about a year ago).

    Also, I have a question about leaving the grids in while away on vacation. Before the renovation, I always took them out for fear that the pressure would go up too high while I'm away from the pool for a few weeks. It's probably not an ideal way to run a pool since without the girds I'm basically just circulating water (and yet the water never looked too bad after I got home from a trip) But now since the filter cycles seem like they are going to go much longer, I was wondering if I'd probably be ok cleaning it good before leaving, adding new DE, and then just keeping the filter running with the girds in?

    12,000 gal. Anthony IG pool; 3 ft. shallow end to 6 ft. deep end; Built 1989; Renovated July 2014 using a 10-part unexposed quartz plaster aggregate of 3 S-grade Blue, 3 S-grade Gray, 2 T-grade Blue, 2 T-grade Gray; Apollo VA-52 DE Filter; Hayward SP-2607X10 Super Pump 1-HP Single Speed; Jandy AE-Ti Heat Pump; Taylor K-2006 Test Kit

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: DE filter cycles are much longer following replastering last this com

    Glad your DE is lasting longer between cleanings! I suspect you're right about your old plaster decaying and then being the factor that was clogging up the filter more often last summer. I don't have a DE filter but with my sand filter I only backwash once per month at the most during the swim season. Perhaps other DE filter users can chime in.

    As far as vacation and grids, that would depend on how long you're going to be gone versus how long you're going to be gone. If you're going a month between cleanings and you're going to be gone for a week, I wouldn't hesitate leaving it run on filter while you're away as long as your chemistry is maintained while you're gone.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  3. Back To Top    #3

    In the Industry

    Join Date
    Jun 2015
    Wildomar, California

    Re: DE filter cycles are much longer following replastering last this com

    Most DE filters here in California are backwashed every 3 months. Unless, of course, you're that neighborhood guy where every kid comes to your pool to swim. LOL

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