yea, i think you should be able to...just keep it at the top if your afraid that it wont make it....i had 40 watts in a 10 aga once and it opened up nicely and was healthy...and it was at the bottom of the sand....i recommend buying only 1 stalk though...because they grow very fast
give it a try!....good luck
best coral ever. your clowns will probably have the best shot hosting it, and it will retract for a while when they start, thats normal. hammer and torch corals are also great and are pretty much the same thing.