I was wondering if anyone had any advice with regards to losing pressure on my filter. I have completely cleaned the the big filter cartridge inside the filter. I bought a new o ring for the filter. Whenever i clean it the filter pressure starts out at say 15 or 20. By the next day, if I am lucky maybe two days the pressure gauge will hit 30. At this point the pool vac will barely move and no longer clean the pool. I have noticed that a drip or two will leak from the side of the filter where its clamped down but not much at all. I have screwed the things in that hold the filter closed, really tight. I don't know what else to do. Does anyone know what this might be? Is it time for a new filter? Thanks