Quite honestly, you're just as well off making you own kalk paste, I have used Joes Juice, thats pretty much all it is, heck of a money maker.
As to the fish question, it is not a Raccoon you are after, what you need is a Copperband Butterfly, however, they are not an easy fish to keep and this would not be my first recommendation. If you only have a few aipstasia, going after them with kalk paste is your best bet. The only downside to this method, is that if any, and I mean any, tissue from them survives they will grow again. If you get at them early though, you should be able to keep them under control. Peppermint shrimp(Lysmata wurdemanni) will also work, provided you actually get peppermint shrimp and you have nothing in your tank that will go after them. I have seen local stores selling camel shrimp as the same thing, they are not.
Allen