My 20 gallon Aqueon filter is haunted. Up until recently when I have unplugged it to clean it out, it occasionally took about 10 minutes to "warm up" and start working again. Actually, I'm not really sure what it was doing but it wouldn't work right away and even though I could feel a very small vibration from the filter there wasn't anywhere near enough power to suck up any water or filter anything. That 10 minute warm up period got a lot longer after my last cleaning session as the filter didn't work at all when I put it back in the tank. Just the small, useless vibration for a couple of hours but no filtration. So I pulled it out of the tank and let it sit for a couple of days to see if it needed to dry out. When I tried it again - nothing. It annoyed me because it's only about 6 months old so I persisted and left it in the tank yet again and after 48 hours it miraculously started working again. Has anyone else had this happen to them? I'm afraid to clean the darn thing again because I'm afraid it might not start up when I pull the plug to clean it. Seems very weird that it would start up again after two days of it not working. Super strange.