I've had two eheim filters. The first one spring a leak and I replaced it by sending it back. The one I have now has seemingly been working well, but it's been running for about 3 months so I unplugged it, and flushed it into the sink with treated water. After I set it back up, it was spraying well out of the spray bar. Then when i went to close the stand doors something was sticking out, so i rotated the canister about 15 degrees. There was a whoosing noise and then pressure was reduced in a couple of the holes. I want all my flow back. What did I do wrong? I hope somebody can help, I am not very pleased with this filter thus far.