I'm cooking a rock right now to get rid of the green mushrooms that magically appeared on it one day... I've never tried kalk paste for them but a friend of mine has and claims to have good results with it. Lately my other solution to all of my tank problems has been a handy little butane torch I bought at Princess Auto for $10. I've torched green star polyps, anthelia and hair algae with it so far. Works like a charm and leave a nice burnt seaweed smell that I think gets you high
