Hello everyone, I am new to the board and was hoping for some suggestions as I am new to having a tropical aquarium as well. I am looking to add another fish or two to my already established aquarium. It is 40 gallons and as of now I have as follows: 4 tiger barbs, 2 rainbow sharks, 2 albino rainbow sharks, and 2 rosy red barbs. I am thinking about possibly adding a bottom feeder type and any suggestions would be great. Thanks in advance.