We have had two blue gouramis for about 3 years now, sometimes I wonder if they prefer the tank to be in their particular order. About three weeks ago I noticed that one of the light bulb covers was sitting down at the bottom of the tank near the front. Last week, I saw the other cover also at the bottom, but they were lined neatly along the back wall of the tank. Now, every time I walk by the tank, both fish are chilling in their own half-cylinder of plastic, in the back corner of the tank. Is it possible that they knocked the covers off, and moved them to a spot of their choosing? I don't think there is enough current to move the covers...just curious if anyone else has fish that double as interior decorators?!?