It seems like the pump itself is clogged or failing, even when I use the manual pumping to fill it, it's kind of hit or miss on if it actually does anything or not.
I replaced the impeller and it's cover, and that helped for about a week, then it stopped again. Is there something else I should clean or check?
I don't know how much I can take it apart, and I have a lot of tools and creativity so I'm hesitant to just start dismantling it and then disassemble something that can't be put back together.
is it like the smaller filters where snails can get in and jam up the intake, even though I have a pretty fine pre-filter sponge, and I need to uncover the pump motor to clear away shell debris?
Is there some other problem I don't know to look for that I can check?
Full disclosure: I have NO idea how old this filter is, I got it used earlier this year and it's been working fine until now.