I usually lower the pool by ~ 8-10 inches on a normal backwash cleaning routine. Yes, I do backwash as you describe in your post with the exception of the 1 minute filter cycle and repeating the backwash /rinse cycles. Thanks for reposting your pearls of wisdom. This pool is beginning to feel like owning a boat! And I'm installing a Goldline SWG system in the next couple of weeks.
The pool has been rather expensive this month with the conversion to borates, new pool sweep pump, and lots of acid and chlorine, etc. Dummy me! Of course they would not let me return the new ones, which I had not installed yet. I returned to the store, where my "expert" explained that this was how the grids were constructed. I had puchased 7 new grids and took them home where I thought I had discovered that some of the new ones were broke. Only one, and I know how that was broke, by me! I did not know that the main cross spars on the grid frame were supposed to be able to move and flex. It turns out that most of my filter grids were not broken. On a side note, my education of pools was furthered this morning at the pool store. There is no way in the world all the DE I observed is picked up by circulation, besides alot of it was in big clumps. My pool store "expert" says that all the DE I see on the bootom of the filter case is picked back-up when circulating. I have 2 other suction sources working concurrently. I've been adding the DE through the skimmer as you describe, too. Is it normal for the grid frames to break like this? I assume it is necessary to replace the grids when you find a broken frame or is it? Do most of you manually clean your DE filters more frequently? Looking for your advice and experience. But why are the frames breaking on my grids? I normally backwash after I see a about 5 psi delta from the initial pressure after backwashing.
Pentair fns plus 60 filter grids manual#
I should have been using only 5 scoops rather than the 6 required after a manual cleaning.
I now know, from reading here on the forum, that I have been overcharging my filter w/ DE after a backwash. and the grids were packed with DE muck between the grids. The bttom half of the filter house was about 30% filled with D.E. After what I found today, maybe I should be doing this job myself. I normally have not done this maintenance, a pool proffessional has been doing it for me. None of the filter grids' cloth was torn this time. The last time it was cleaned I had to replace 4 broken/torn grids. It has been one year since the filter was last manually cleaned. Six of the eight grid frames were broke near the top of the return pipe. I disassembled the grids today to do a manual clean/soak on the grids. I have a Pentair FNS Plus 60 DE filter on my pool.
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