I have just done my first racking of this year's elderflower, and strawberry, wines.
Foolishly, I did not take a second SG reading (I took an initial one at the start of the process a month ago).
I topped each demijohn up with roughly 1 pint / 20 oz / 600ml of water. Of course, this means that if I took an SG reading now it would read lower (closer to 0) than if I had taken it without topping up (right?).
I am wondering if there is a piece of maths that I might apply to the next SG reading I take, which will likely be in about a month, at second racking (this time before topping up!).
Any help much appreciated.