YummyMummy
New member
Hi all, I bought a fully established tank about 6 months ago and have had no real issues, however there was two rocks that had a green hard plant like thing growing from them, I didn't think this was an issue till I started noticing it growing on other rocks and even on the shell of one of my hermit crabs, I have no clue what it is despite the extensive searches, please help 
Thank you

Thank you