so in the winter I double my bettas in the same tank with a heater(they are seperated one is in a vase though because i have limited heaters and dividers). So anyway I have this male named poseidon who was in with my other male pit(again they are seperated) and he was healthy and happy. But then i removed him and put him in the other tank that I just bought that would allow him to have his own 10 gallon. But then as soon as I took him out of sight from pit, he got all stressed and lost his color. But then I put him back in and he was happy. I dont get it.