actually, in considering other potential causes for this...
just last night I introduced a couple xenia frags and used the toothpick method. they aren't completely opened and one is looking worse than the other... maybe one/both are emitting their slime - fairly close to the frag. 6-8" away
so, I moved the frag to a different spot.
but, still...is the mainstays gel super gel ok for inside the tank? it's gotta be, right?