problem fish

Back when I used to work in a pet store we would get people who came in to buy fish as presents for their loved ones for their birthday. The only problem is they would know nothing about the tank, and usually try to pick the biggest or meanest fish that was in budget. I would always try and...

Whether it's temperament, coral nipping, excessive growth/taking over the tank, or just being a troublemaker in general what is a species of fish or coral that you would never own again? For me it would have to be Red Disco Mushrooms. I put a single one in my 75 a while back and I am still...