My Red Tai Crab just got done molting for the second time in about 4 weeks. I was thinking they only molted once or twice a year. He is a very healthy looking and his moltings look good too. Does anyone know how often and/or what triggers molting? Mr. Crabs appreciates everyone's advice.

they molt for all sorts of reasons. stress and growth mostly, inverts salt or fresh, once they reach max siz start to molt less. i have a lg salt hermit, he molts bout once ever two or three months, he grows so quick

The crab grew quickly