I just but my betta in a new setup yesterday. It is a 2.5 gallon rectangular tank with treated water that sat out for 24 hours. I used the same substrate that I had him in before and rubber plants. I added a small whisper filter (labeled for 1-3 gallon tanks) and Im adding a small 10w heater today. The filter seemed to be pumping too hard so I punch a slight sinch in the hose to limit the flow, its much slower now. Innitially he seemed fine and was getting used to the tank. He was fighting the red glass thermometer, and getting used to the limimts of the glass (swimming against the walls looking for holes). A few minutes after I put him in I noticed his color was flushed. He is a red vt and he was nearly colorless in some areas. I have noticed that his color gets richer when he is flaring, can it also fade under other circumstances?