The aquarium is 31 months old. I originally bought some live rock with some mushrooms on them. Over time they have multiplied, especially the purple ones. I had two anemonies in the tank that eventually became seven. At that point all you could see was anems and the mushrooms hated them. They jumped off the rocksp to get away. When ever I had an opportunity to get an anem out, I would take it to my LFS to trade or a local high school with a salt tank. I am down to just one now and have a Barberi Clown that host with it. When i had several, they wander around the tank and drive everyone else crazy. When I have the flow and the lights just right the mushrooms are huge and I call that a happy mushroom day. I have had to slice a few off if they grow into a neighbor but they just attach to gravel and start to grow again.