I have a 10 gallon heavily planted tank. I've had it at least 5 years. My last fish died and all that's left are about half a dozen Amano Shrimp. I was thinking of having just a shrimp tank. Today I went to the LFS and asked to buy three blue velvet shrimp and the sales guy talked me out of it. He said the amanos might eat the blue velvets. The blue velvets were only about half a cm long and he said they were fully grown.... which I don't think is true, so I'm confused now. Is there anything I can put in with the amanos besides fish?