I have a Cherry mead that I made from a short Mead kit. It is currently in a secodary now. I racked it into there while it was still sweet 1.020. I used a campden tablet and potassion sorbate to stableize it. It is clearing up well with a little sediment on the bottom, but there is a thin scum or bubble layer at the very top of it. This is a one gallon batch in a glass jug with a 3 peice airlock with vodka in it. The question is I was wondering if this is normal and how long should it age before bottling?
Thanks
Dave
To start with, I don't do "kits" with meads. I can't see any point.
I don't quite see what you were aiming at by using sulphite/sorbate at 1.020 as the sulphite stuns the yeast and the sorbate just stops it multiplying further. There's no guarantee that either of those will actually stop a ferment (it's actually quite hard to do that other than chilling it to just above freezing).
As for the scum/bubble layer ? well, its something that can be experienced and there's no certainty that there's anything wrong. What you can do is to re-rack from underneath the layer and try not to take any of the bubbles/scum into the new container (which should have been cleaned and sanitised correctly).
You should make sure about keeping any airspace down to the absolute minimum in the secondary container, whether it's "topping up" or by using sanitised marbles or glass chips to take up the air volume (careful about putting these into a carboy/jug etc as it's easy as hell to break the bottom of the container).
As for how long before bottling ? Well it's really up to you. I tend to "bulk age" my meads until they "taste right". Unfortunately "taste right" is relative to what each of us like. I'd just suggest that you concentrate on making sure that the ferment has finished (take 3 or 4 hydrometer readings but each reading 3 days or so apart - when it's exactly the same on 3 consecutive readings, then the ferment should have finished and you can start on the racking/clearing process).
Once you've got it clear, you can either bulk age it, or bottle it and age it that way. Or it might be that you need to further process it, like it might need back sweetening or something. It's unlikely to taste good as soon as the ferment has finished, and equally, it's surprising how good it can be after it's had some ageing time. I age mine for at least 6 months, often a year plus.
Dunno if any of that helps or not...
regards
fatbloke