The medium batch seemed a bit weak tea-wise but had a bit of vinegary bite with a little sweetness. We used 1/3 cup pink grapfruit juice, 1 Tbsp sugar and made 12 bottles
The large batch was a good strength teawise with a perfect sweetness (not too much or too little). We used 2 tsp sugar and made 11 1/2 bottles.
Grapefruit was pulled at 4 days and it had barely a pop but had good fizz.