I am happy I moved my betta from a 2.5 gal tank to a 10 gallon tank, today I was looking at him and noticed that he is now turning from red to a much darker blue, before he was red with a bit of blue, when I first got him he was yellow, this is the second change in color. My question is, is this ok that he is change colors for a second time, when I asked before I was told that his colors were just comming back. And if this is ok how many times can a betta's color change?