Pummelo tree

Question

What causes the fruit on the tree to have dry juice sacs?

Answer 1

Some varieties of Pomelo are naturally more sour and dry.
Environmental factors can effect the fruit, irregular watering schedule, lack of sun and temperatures all play a part in the fruit.
Correct harvesting schedule. Fruit that is not fully ripe or over ripe may have poor qualities.

https://www.gardeningknowhow.com/edible/fruits/pomelos/pomelo-tree-care.htm