Originally Posted by
Reeferrookie 
I use the gel form and it cures in seconds after it's in the saltwater. No need to wait at all.

+1!
Get a good glob of the gel on there and just put it where you want it....be sure it is where you want it. Moving it later may not be so easy. I have a sea fan that is where it is to stay forever, I can't get it off without hurting it. My cabbage coral (much larger) however, I have knocked off and had to reset it over the years.