Hello! I have 14 fish in my 38 gallon tank, and 5 of them are tiger barbs. Yesterday night I noticed that I only saw 4- upon later inspection, I found one hiding behind the heater and today hiding behind the filter. The separated tiger barb is the smallest and I think he's being bullied. He is noticeably paler than all his fish counterparts, and he looks shaky and very stressed out. He is the only unhealthy looking fish in my tank. Is there any way to help him? I'm trying to put the bully in an isolate tank and reintroduce it to the tank later, but a. I can't tell which one is the alpha because they all look the same, and b. when it was the lone tiger barb in the tank I tried catching it for an hour straight and it's just way too fast. Please send help. Happy Easter to the ones who celebrate!!!