I've been using a Pentair T100 sand filter since I built my pool 3 years ago without any problem what so ever. But....I've just been given a brand new Pentair 180007 FLT FNS Plus D.E. filter. I know D.E. Filters are "better" but I've had no complaints with my sand filter except a little algae problem now and again from not staying up on my testing. But my question is: Is it worth the plumbing headache of installing the D.E. Filter or should I put it on craigslist and stick with my sand filter?