While it's not ideal, it should be ok for primary fermentation. Do not try to secondary with that much headspace, that's where you'll run into significant oxidation issues.
Originally Posted by GillesF
... although a refreshing tripel is very nice too.
Haha, only in Belgium would people refer to a tripel as "refreshing!" We're all jealous of how close you are to the wonderful Trappist breweries!
JRBrewer on Untappd
Planned - GP/Mosaic SMaSH
Fermenting - Ned's Red (Flanders Red Ale), Saison Graf, Tangerine Mead
Bottled - Belgian Tripel, Belgo Graf, Saison (split batch with brett), Black 13 (Graf Porter), Old Style Amer. Cream Ale, Amber Graf, Wheat Graf, Bannockburn Wee Heavy, Berry Mead