If you are supposed to rack into secondary, then every 30-60 days until no longer dropping sediment before bottling, what is the best way to top up?
I know ideally I could just make extra traditional to top up with, but in the event that isn't an option, what is the best?
I don't have marbles handy.
Honey water? Fruit juice? Plain water?
I just topped some up with filtered water, but it dawned on me that it may cause the final product to be watered down?