earlier my fish were not feeling well at all and they were barely swimming or eating i left for a few hours and came back home and noticed them swimming around alot more and when i looked in the tank closer it looked like they had gotten sick i don't no if it was from them or if it was just broken down food (but it was in 2 perfect piles) that accumulated there but i was just wondering it may sound like a dumb question but the reason i am asking is because i believe they had some kind of indigestion or something because they hadn't eaten for the last couple of days and they were really gloomy not doing much at all and Colombian sharks are really energetic and swim alot so i was just wondering appreciate the comments.