Hi, I have one 20gal tank currently running right now. It is at the end of completing the cycle. My wife is Mommytron, she has been posting for a while, but I would like to learn myself so I can help a bit more. I am very excited to have a fish tank so our daughter can watch the fish swim around. We also have a 10gal and a 27gal Hexagonal which we are waiting to set up until after we get a bit more experience. I would like to do angels in the hex tank, which is why we are waiting. I have heard angels can be difficult. I look forward to learning and thank you in advance for your advice and suggestions.