Once they lay the eggs, you will see them stay in a spot and fanning to keep circulation over the eggs. I think there was a conference here in Michigan on breeding them. One pair of clowns in my bio cube were breeding at the one year mark of the tank, and I'm guessing they may have been a year old when I got them, so two years would make sense. They bonded with a purple tip frogspawn. Also depends on your tank and how well it's going. In my other tank that has been slow going, I'm guessing that pair their will take longer. They haven not bonded with anything, which I think is my fault. I put a tube anemone in there because it was beautiful, and it stung the crap out of them. They leave all corals alone now... Where is the face-palm emoji..