I am looking to get a new fish for my tank and not sure what would be a good one. I currently have 6 serpae tetra and 1 rainbow shark and looking for one that would be safe to live with them. I am looking for maybe a larger fish to go in my 40 gallon tank, if there would be one that would be acceptable, especially since the serpae are known for fin nipping. I was looking for maybe a Bolivian ram, and also thinking about adding a Danio of somesort. Any suggestions would be appreciated.