fast growing corals

Some corals are known to be pests based off their ability to take over a tank and cover every square inch of space. Things like Xenia, damicornis, mushrooms, kenya trees, and even BTAs. If a coral is happy it's going to spread no matter what species, some just do it faster then others so without...

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...