never run your skimmer while adding additives that have to do with API . will over flow your skimmer lol. i did a huge water change, dont turn your skimmer for about a week.
same thing happened to mine after the new tank swap, went from a 20g to a 65g , and it kinda shocked it. now its back to normal, im running more carbon, now hes acclimated after about 8 days.