I have it.Mines are brownish with green interior.
I had a hard time at the beginning,they just didn't open.But they are very hardy,so keep up with them.Mine had polyps fallen off(I reattached them on different rocks with success).I think it took about 2 months 'till all opened(first 1-2,than ever more).
The cyano.
The worst cyano infestation in my tank was on that rock.Eventually all got covered thick with red slime.
Now,here you must find the couse of the things.Mine (I think )was the usage of only filtered water,this containing phosphate that feeds the cyano.
I desperately took the rock out in a bowl and brushed it off sometimes.The slime was back within days.Will not kill the polyps,but they suffer(same with the cleaning).
Good news,I've got rid of it.
- First,I started to use DI water.I bought a Tap Water Purifyer,did a 25-30% w/change.
- I've put in some caluerpa tied to a rock.This is supposed to use up excess nutrients from the tank.
- Do w/changes regularily(I ignored this).
- I bought and used Red Slime Remover(from Ultra life).This stuff is great,I credit this to the success.
Many people are against using chemicals to solve problems.All I can tell you,it did no harm for my reef and fishes.You must watch the PH(it didn't affect mine).
After the polyps open a bit,you can feed them with meaty stuff(reef formula),they catch pieces and retract them.
Good luck!
FM