I've had the perflex EC75 DE filter for about 12 years (pool details below). I just re-did the plumbing to fix some issues. At restart the filter body split. One option for me is to just buy another so I don't need to worry about plumbing again. The DE system works well when I get algae blooms, which I get every summer when the water hits 90+ and I neglect the pool for a week. My past issues have been:
-the "bump" is pretty worthless. If I don't change the DE it clogs right away.
-opening to really clean the "fingers" is a pain
-the filter is probably undersized for my pool
I am also considering the FNSP 60 and would like to hear opinions on this. It seems more difficult to clean than the routine EC75 cleaning. I used a 300# sand filter for 2 years (still have it), but it didn't work well for my pool (too small; pump too strong; poor water clarity). Cartridge filters seem too expensive.
Pool (40 yrs old):
33000 gal plaster with long 1.5" pipe runs from skimmer and drain, 2" returns
motors: Whisperflo 1 HP #WFDS-4 2 speed 1.65 sf, AO Smith 1.5HP
Thanks for your advice,