My filter used to run pretty well, so it would kind of squirt it out the top to like it is supposed to. Now, it just dribbles a little, and is quite slow. should I take it apart and investigate, or just clean it pretty well?
Take it completely apart and clean it really good. When all my filters slow down like that, that's what I do and when they get started back up, good as new!
What type filter do you have and what size? I don't understand the "squirting out the top". Doesn't the water just flow? And what is your tank maintenance schedule, like vacuuming? The filter can't keep your tank clean.