Why not add it to taste after secondary? Does it need to ferment?
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Yeah I should have said during bottling or kegging. No need for this stuff to go in secondary.
Your suggestion is perfect though. Don't know why I didn't think of that. In fact I have a Scotch Ale I bottled a couple months ago. If my math is correct a using 50ml during bottling/kegging would work out to ~1ml per 12oz bottle... So I'll try that first.
Cheers!