Marineland 350 Running Backwards

[buffmaxwell]

Het guys I'm in a bad situation i just took my filter apart to change out the carbon and now my filter is blowing out crap all into my tank instead of sucking it in. I took it apart 3 different times and everything is hooked correctly. I have no idea what's going, I don't have a back up filter please help!!!!!

 

[OldMan47]

Let it run a few minutes max. We never get every bit of a filter clean. It is not even unusual to see a filter dump everything from the return path into the water right after a filter gets a fresh start. If you let it just run for maybe 30 minutes the dirt will start to be pulled back into the filter and things will clean right up. The impeller in a tiny single phase pump like an aquarium filter cannot be changed by anything you can do except cleaning it. It will always be exactly as efficient as it is clean, no better or worse. It needs to be given time after a typical cleaning to get everything stable again. You did stop and start flow after all.