The medium batch was good strength though a tad sweet. We found beautiful ruby grapefruit at the farmers market and squeezed out fresh grapefuit juice. We used 1/3 cup per bottle, 1/2 tbsp sugar to make 10 bottles of grapefruit.
The large batch was good strength but also on the sweet side. We used 1/3 tbsp sugar and made 13 bottles.
The grapefruit was pulled after 3 days and was not explosive. It was on the sweeter side so will used 1 tsp sugar next time if the batch is sweet.