I didn't notice a sizable slime really, even prior to dipping. They look clean now, so we shall see. Luckily it was a cheapie colony, I'm more concerned that there is a systemic issue than something amiss with the zoas specifically. I have some other zoas and palys that seem happy, as is most of the rest of my tank. Dunno. I'm in real estate/closing/moving hell right now, so my tank is simultaneously a nice distraction and something I'd rather not be messing with.