Caulerpa is what I just started running in my tank as of yesterday. I, for whatever reason, didn't have success with cheato for some time in my tank. After the main ball died off, small chunks survived and started to take off out of the blue. Sadly, it got smothered by a red hair algae outbreak in the refugium...but in all honesty that is a macro algae as well so I wasn't too bothered by it.