I have a 60 sq. ft. Jandy DE filter, and I take it apart every 6 months and clean everything out and replace the DE. My question is, if the pressure gauge never goes more than a pound or two higher than the "clean" setting between my 6-month cleanings, is there any reason that I should ever backwash it at all? I guess if I were to get a major algae bloom and had to vacuum up a bunch of dead algae or something like that, I would backwash it, but if everything is in pretty good shape between cleanings and the pressure hardly raises on the gauge, I'm tempted to not bother with any backwashing in between cleanings. Is this OK?