When can i put corals in my marine tank?

Question

When can i put corals in my marine tank?

Answer 1

That depends, have you researched corals? Are your water parameters right? Has your tank matured for a long while?, Do you have proper lighting? Can you afford the up keep that corals cost?  if the answer to all these are yes, then as soon as you find corals that you like, when ever, if the answer to any of them are no, the when you can say yes is when you will be ready.

Answer 2

everything Jessie said, plus make sure your tank has fully cycled. I waited 3 months to add my first coral.