Hi there, since starting home brewing, 4 batches ago, I've been following the coopers recommendation of 1 carbonation drop per 500ml bottle.
They recommend 2 drops for the 750ml bottles which they used to supply with their DIY beer kits.
I've found that 1 drop provides a little carbonation but not enough for me. If I was using the 750ml bottles I reckon 2 drops would be spot on.
I'm wondering whether to stop using them and adding brewing sugar to get more carbonation, but the trouble is I don't know how much to add to each bottle.
This may/ may not have answered your question but that's what Coopers suggest!
