A few days ago my TSN had a violent swimming episode of banging into the glass and floor that lasted about 15 seconds and then he just layed in one spot for hours. The next day he seemed fine swimming as normal and did it again but for only a few seconds. Now he isn't swimming around even in the dark as he normally does, he just lays in one spot. He hasn't eaten since (I feed everyday)and its been a few days. I'm worried, any suggestions?