How do aptaisia spread?

[Fish]

Good to know. I've been pretty lucky. In my whole time in this hobby I've only had two aptaisia (on the same coral I bought). To get rid of mine I heated up a glass of water in the microwave, took the rock out of the tank, and used a syringe to baste the infected area with super hot water. I did that for about a minute and the rock was hot to the touch when I put it back in. The blastos closest to the treated area looked 'unhappy' for a while, but the aptaisia was never seen again.

- Chad