Fresh water dip is not good for corals, they might not make it. I used melafix and have no issues at all with anything. It's very mild for any kind of coral. 2.5 ML melafix mixed with 1 cup of water, dp for 10 minutes and rinse in tank water in separate container twice. You can use revive as well but Melafix does the job. Additionally you can use Seachem iodine dip, it cheers up the corals if they are looking sad.