WTF IS WITH REEF CRYSTALS SALT!!

[sphelps]

One potential issue I'll point out which may or may not be relevant is the amount of the salt you mixed up. Although rare I've seen it cause similar issues before when small portions of large pail of salt is mixed for water changes, you can end up overdosing on something if the salt pail is poorly mixed or something has separated. IMO if you're unable to mix large portions of a pail at once then you should use smaller packages.