Torch stinging clowns?

[ladyonyx]

I have a pair of onyx clownfish (Rod's Reef) that I've had for about 6 weeks. They're still very small, only about an inch long, and they finally left the power head and started hosting in my torch coral. After a few days of being in the torch, I started seeing small white patches that would appear on their fins, that would stay there for a day or 2 and then disappear. The smaller of the two clowns had a white patch on his eye for a day and a half which is gone now. None of this seems to be affecting their behavior at all. Are they getting stung by the torch? If so, will this eventually stop? Or is this just not the right coral for them? Please advise