I was doing doing my pool routine tonight, and I noticed while the pump was running there was a large ball of debris in the pump's strainer basket. The debris was pressed up against the side of the basket and blocking the pump's outlet, but as soon as I turned the pump off, the debris got sucked back into the suction line. The pump lid isn't crystal clear anymore, so I can't be 100% sure, but it looks like the debris is just normal leaves and "strings" from the palms.
I have a couple of questions:
1. Since I haven't had a lot of debris in the pool so far (I've only owned it for 9 months, so I haven't had the pleasure of a fall season yet), it is entirely possible this back pressure has always existed and I just never noticed it before. Is it normal to have back pressure at the pump? If it is not normal, is it harmful, what causes it? I bought new cartridges for the filter in about April, and the pool was barely used over the summer, so I can't imagine the cartridges are clogged.
2. Regardless of whether the back pressure is normal, how do I at least temporarily stop it so I can clear out the debris?
Thanks in advance for your assistance!