I'd just do a quick test of your parameters, specifically dKH (alkalinity), to make sure everything's still where it should be. Acids can lower dKH, and sometimes even pH. Lower dKH may even alter calcium levels, too, since they're somewhat tied together.
This almost makes me prefer to try the kalk method, as that'll buffer the water instead. A larger tank may not see this problem, but mine's only 50 gallons of total water volume.
But on a brighter note, congrats on some confirmed kills!
We should put little decals on our tanks for each aptasia we kill, like fighter pilots.
