Great news but did you read the article mebid posted? Ich will be on the fish then go back to the sand to multiply and then go back to the free swimming stage then back on the fish- and repeat. I hope the additive works and you may also consider a uv
I also think 30 may be pushing it for the coral beauty LA has its min at 70.
I talked to a marine biologist at my lfs
on the ich subject and he is a firm believer it exists in every tank and is only a problem for fish that have low immune system or stressed so just do what you can to keep stress low- keep lights down and lower flow during acclimation period- and you may be alright.
That said I would get a qt for future even a 10g w all the components is like $50 from Walmart.