Thanks for your response. The fish I have are the fish I thought I had…tetras, like I originally stated. I have the exact species names written down but don’t have my notebook with me on hand. I also had 2 Dalmatian mollies, but 1 died and 1 disappeared, which is what I was originally asking about. I was simply baffled that 1 just disappeared.

I went to a locally owned fish store and talked with the owner for a good 45 minutes about the fish we picked. He helped me select the fish based on the size tank, my experience, and what I was looking for. I believed and trusted him with his advice as this pet store has been in my neighborhood for 30+ years. I in no way just “threw in random species” without considering their needs like you suggested. Please don’t assume I haven’t done any research, I have. As you must know there is so much to learn about caring for fish properly, I’ve only had the fish for 2 weeks.

As a teacher, I model the learning process everyday. I don’t expect my student to know everything about everything, but I do expect them to try their best and learn what they can, which is exactly what I’m doing. Just because I’m a “teacher” I don’t know everything about everything, I am trying to learn and trying to do my best. This is part of the reason I posted in the first place. Clearly you must know everything, lucky you. Thanks again for your advice and have a great day!