All mushrooms are pretty hardy imo, I actually have a lot of different mushrooms and I lost my ricordia! I guess it was a bad egg. They grow like wildfire, so they are all great starters and fill up the tank. I had a huge red mushroom, and it let go of the LR it was on and it disappeared, but it left 5 little mushrooms. You can chop em up and they will either refission or divide and heal into more mushrooms. Imo, if you see a mushroom you like, and it is not a hairy mushroom, go for it.