Originally Posted by beefandpork
I would hate to turn on 96 watt for one little frag...LOL
That one little frag wants all of those 96 Watts, so I wouldn't feel bad about giving them to it!
I'd start out slow with just one. No real reason, just that if something goes bonkers you minimize your losses. But any of those you listed are pretty much "plug and play" assuming you place them in the correct locations. (Open brain and plate on the sand bed.)
Calcium in the 380-420 range? Alkalinity in the 8-12 dKh
range? Salinity around 1.025ish and pH in the 8.0 to 8.4 range? If so, sounds like you're good to go.
In a 20g, I'd suggest possibly taking the torch off the list. They can get big in no time at all if they're happy and can really reach out and sting just about anything. In my 46g, I had one smack dab in the center of the tank and it was able to reach pretty much anywhere it wanted. (Bad choice on my part for placement.) Ended up having to sell it back to the LFS
to save the rest of my coral! They don't play nice with others and in a 20g, I'm just afraid it could wipe a bunch of stuff out before you would even notice.