I just got into fishkeeping. Here’s my 10 gallon glofish tank with 3 tetras and 3 danios. I have two drawf anchor catfish in the tank as well to try and fight brown algae attacks. I’ve had them in there for a couple days now and have only spotted one at a time - Not knowing if I have two or just one because when I cleaned my tank, including vacuuming the bottom, I worry that I accidentally killed one. Any similar experiences out there? Thanks! 
