I need some quick help please. I am in the shocking process and went to clean my cartridge filter. Usually, I have no problem, but tonight I unscrewed the top knob and the rod that holds the top came unscrewed from the bottom. I screwed back in, but apparently I can't get it tight enough because now I can't get the top to tighten all the way down to seal.
I really need to get the pump/ filter back running so I can finish the shock process.
Does anyone know how to tighten this rod back into the bottom of the filter body?