I have a 220 gallon mixed reef and I keep my salinity up by adding salt I've dissolved in a quart jar. It is of course very concentrated. Today I added some from the jar and about 5 minutes later I noticed my skimmer foaming over. My skimmer is generally very stable. It was only half a jar of dissolved salt (which of course means nothing) and it had an almost imperceptible effect on the salinity level when measured an hour or so later. Has anyone else experienced this?