So I bought three black fin sharks at Wal-mart on Tuesday, and they haven't eaten since Wednesday morning. They're in a 2.5 gallon aquarium with a bubble pump, and no filter. I've been feeding them tropical fish flakes (what Wal-mart said to feed them) and they ate them twice and then stopped. I also tried to feed them steak and they wouldn't take it. I thought all sharks ate meat. So if you have any suggestions of what I can do so they eat and don't die, please let me know. And also, why is the water all cloudy and white?