I am running into sort of a problem.....well honestly thiere isnt much i can do, so i guess this is kind of a lesson to be learned for me and a lesson to be learned for anyone that reads this thread. Do not always trust you local fish stor keepers, they may say they are there to give you good advice but in the long run they are there to make money and will do what it takes to see fish. I recently bought a pair of paradise fish from my LFS and well when i did they told me that they would gtet along will in my 50 gallon....well thefought until they killed eachother, i tried seperating them as soon as i noticed but the damage was too severe, I also bought from them on that same day two rainbow sharks. The LFS again said that they would have no problem liveing together im my tank well it appears that the one slightly larger Rainbow Shark is chasing and harrassing the other one to the point of exaustion....I guess i am going to have to try and seperate them but i have no where to put him, my other two tanks have non-aggressive fish and I am not really sure what to do. The moral of this situation is allthough many fish store owners may want to give you good advice on your fish keeping you probibly should do extensive research on every fish you plan on buying before you buy any fish and add them to your tank, not only to save you money and frustration, but also for the fish's health because when it comes down to it we are there caretakers and we are the ones they depend on.