When to add a Clam

[Marcus K]

I'm not sure if I am ready for a Clam. I am interested in getting my first but not sure if my tank is mature enough yet. The tank has been up and running for over a year and everything is going well as I have taken my time adding things to the tank. The fish and corals that I have are doing well but I would hate to loose a clam if my water quality was not stable enough. How does one tell?

Marcus