im pulling my hair out because it seems like my filter is barely pushing water thru the outlet tube..im pretty sure it should go more than it does.i cant even use the jet nozzle at this point..ive cleaned all parts including hoses to see if there are obstructions and find none..what else can it be..it seems to prime fine after i release the double end taps and lots of bubbles flow..hmmmmm.eheim is supposed to work really well right? i gotta be missing something..any suggestions..thanks