Hi I have just started a reef system for cycling, put in the live rock today and noticed two green mottled slugs with what appeared to be purple shells.
Please let me know are these bad pests or good additions to the tank? I wasn’t able to find anything like them online. Any idea of species?
I have 2, but I paid over $30 each for them. Nice score!
You’ll absolutely need to supplement them with algae sheets. My big one (over 6”) eats a sheet at least 3-4 times a week in my 150 display.