My penguin 1140 all of a sudden blows 2-3x more than when I first installed it less than a week ago. It's actually blowing all the san out of the corner of the aquarium. Before it barely rippled the water now it's crazy.
Sometimes when you plug in a power head it won't really work will just kinda rattle....when you unplug a few times it will finally kick in and push water.....maybe this was happening and you didn't notice? Happens constantly with my marineland junk deal....
I know about all this, but it's weird. The damn thing was weak and I unplugged it and it went to what I thought was full power, then all of a sudden the other day it doubles it's power at least.