Hey guys, I have a quick question. Well I have a Colombian Shark and a bunch of other tropical freshwater fish. They are all young so it is ok for them all to be together now, but as the Colombian Shark gets older he will need to have brackish water, so he will be separated from the rest and given his own tank. I would like to give him a buddy to swim with that is also a catfish but i do not want to purchase another Colombian Shark. Are there any other catfish that I could put in the tank with him that are brackish?