rock with aptasia, can i kill it in one shot?

[megs_clark]

I was curiouse. I bought some extra rock with aptasia on it. It was such a nice shape with lots of caves and holes. I currently have it in a spare tank with a powerhead blowing on it. My actual running tank doesnt have any aptasia in it right now and im trying to keep it that way. So my question is is their anything i can do to the rock before putting it in my tank to kill the aptasia in one shot. Theirs nothing on the rock that im worried about saving so i was wondering about dipping it in boiling water. Or raising the salt level in the spare tank for a bit?
When i seen it in the persons tank it had quite a bit larger aptasia growing. They had told me it was easy to kill so i bought it foolishly and after reading on here it sounds like i should not have. I had it in a dark bucket with just the power heads for just over a week. Now that its in a aquarium with light i cant see any, i thought i had seen a small one but then i looked again and it was gone. Are they hiding?? I dont want to cook it for months, but dont mind waiting it out a couple weeks just thoughts id see if anyone else had ever done anything sucsessfully in one shot without having to go through with joes juice.