Koi bettas are tropical fish, so they must be saved in tanks with heaters due to the fact room-temperature h2o is often too neat for them. They can be held in tanks as heat as -86?File but do ideal in tanks which are 75–82?File.Dec thirty, 2016 #seven I'd a female for months, yellow koi, she didn't change a lick. Purple is a lot more prone to imp