corals are alot tougher than you think,, you can keep it out for a decent amount of time with no ill affects..i fragged my torch and bubble and i had them both out for at least 15 minutes along with my other corals when im gluing them,, they strive! people always say thhat super glue gel doesnt work for corals to rocks,, but if you let it dry for 5 minutes in the air it works and the corals are fine..
people dont realize that alot of the time when low tide comes in that there are certain reefs int he world that get exposed to the direct air and sunlight ont he top of the reef for hours at a time,, and the corals still thrive with no ill affects