A great general rule is one pound of fruit per gallon of sangria. This will yield a revitalizing and fruity beverage, without being too sweet. When it comes to what kind of fruit to use, it truly depends on your choice. https://scarabnet.org/?p=753 Some great alternatives include citrus fruits like oranges and lemons, stone fruits like peaches and plums, and berries like strawberries and raspberries. Experiment till you find a combination you like!