hey i had a rock with quite a few on it and i injected it with calcium
A)calcium will be fine in your tank (unlike sometimes with lemon juice)
B) a straight shot of calcium just straight up ODs the little guys and they never come back.

if i remember correctly morinville is close to edmonton? i had to get shots for the kitten and just asked them to give me an extra needle for the tank, G&E pharmacy in edmonton carries that sort of stuff they are on argyll i believe, but 1 shot of boiling water each and they're history

when i used to worry about aptasia i used joes juice. you buy it for pretty cheap and just inject it onto the moutn of the aiprasia and it is dead within an hour. just make sure you act fast or they will multiply and grow under rocks and they will be there forever

If it's just the one I would just pull the frag and scrape the little sucker off. It's easy as that.

Thanks for the tips everyone!

I injected it with boiling water and it worked perfect!