Great, thanks for that! ! The rock is... erm. I’m not sure now ! . It was part of a purchase from a broken down marine tank. I put it into a cycling EA 900 reef pro and it began sprouting anemones. I think they got killed off at the advice of the local aquatic store.
But I gave up on the idea of marine before the tank even finished cycling, debated for a year, and have now purchased an EA 1500 reef pro and have decided to go Tropical.
The rock has been sat in the shed for that year. I’m not sure how I’d describe it now... !?
Grateful to know how to describe it if anyone can help.