Today I noticed all 15 of my tetras acting strange. They are swimming at an angle with their heads pointed down and a few keep flipping upside down. From what I have read online it sounds like Swim Bladder Disease. I didn't feed them at all yesterday and this morning they all went nuts when I fed them so is it possible that eating too fast/gulping air while eating may have caused this? Any suggestions on what to do or should we just leave them be and see if they get over it? Thanks!