Other Rose disaster

[horacegoeskiing]

I have been making Rose for a while now but have never really had really the opportunity to age them much past 3-4 months. However lately i have ageing all my wines and all seem fine except the Rose. I have White Zinfandel - Vintners and a White Merlot - Kenridge Classic both admittedly were aged using a primary fermentor for the 4 weeks before moving to a 5 litre PET demijohns to be aged before bottling. Both are now 5-6 month old. The White Merlot - Kenridge Classic (6 month old) has gone from nice to undrinkable and the White Zinfandel - Vintners (very nice 2 months ago) does appear to be also changing for the worse. My only idea for this transformation is that i didn't put them in into a secondary fermentor (with considerably less air than a primary and they are fast becoming oxidised. Has anyone got any thoughts on this.

 

[jamesngalveston]

if there is little to none headroom it will not oxidize.
how much headroom is present...
you did not say what type primary...carboy, bucket, trashcan, etc.
4 weeks seem a bit long, why not go by what your hydrometer reading is.

 

[horacegoeskiing]

Thanks James, no the headroom was quite large as i followed the 4 week kit instructions using 25ltr wide neck fer mentors. On the fifth week i moved them to the 5 litre PET demijohns.
For the last 2 month i have been using Better Bottle Fermenter 22.7 litre for the secondary part of the process once fermentation has finished. However does that mean the wine collection pre - better bottle could have problems and will need drinking up?
Thanks