live rock turning green

[cantagious]

My live rock is turning green dont know what the cause is (BUT HOW STOP IT)

 

[atwinparadox2]

it's algae of some kind probably? Do you have pics you can post for more clarity? Are you using DI/RO water? If not then that could be causing algae. What are your tank parameters?

 

[Playa-1]

How old is the tank, What are your water parameters testing at?
Define turning green or post some pics.

 

[Nano Chris]

It will eventually turn into purple coraline.