I have a 72G tank. It's been running for about 10 years. Water parameters are all normal. PH usually runs 7.6. Lots of artificial plants and hiding spots. I have 6 each of red serpae, silver tip and red eye tetras. I bought 6 danios a couple of weeks ago - all were dead by next morning. I bought 6 platys last weekend - all were dead w/in 4 days. I strongly suspect the tetras of bullying them to death, specifically the red ones. I really don't want to get any more tetras as I'm tired of seeing them kill my new fish that I try. Any suggestions for fish that will "keep them in their place" until they are gone? I know that sounds bad, but I don't have anyone to give the tetras to, so I'll just have to wait for them to die off I guess. Not sure what to do. I love the high activity level of the tetras but NOT the bullying. Help??