I've got a frogspawn that's doing wonderfully in a 12 gallon though it'll soon be transfered to my 55. I guess it should be mentioned what/how to spot feed, should you go that route (and I suggest you do to keep it happy and healthy). Buy some zooplex and phytoplex (they contain zoo-plankton and phytoplankton respectively). Shake each well, then, for a 12 gallon, you should put only enough in the cap of the bottle to come up to the first thread on one, put it in a bowl/cup, then the same with the other and mix them together. You then use a syringe (these can be found for like $1 at your LFS), suck up the mix, then squirt it at/around the frogspawn tentacles. Personally I do this once a week, and with a small tank you probably shouldn't do it more than that to avoid crashing your tank. Hope that helps.
And for future reference, it might help to find out how to care for your corals when/before buying. That way you can get the supplies and have them ready, with instructions, when you need them.