I've gone through two betta fish in about a month. I have a vase that contains gravel and a bamboo plant. The water is spring water and the plant and vase are located in the bathroom. They get the same symptoms, a clinched up tail. They refuse to eat, even though they displayed ridiculously the first two or three days. I have stress coat in there and there are no other symptoms. I'm wondering if the mirror is causing them to overstress and get the clinched tail. If so, is it possible to put a goldfish (minus other fish) in the bowl and clean it weekly?