Ratio's aren't the only thing to consider when choosing fruits n veg, though it is usually the main concern. Citrus and acidic foods shouldn't be feed daily as they can cause diarrhea
But they can be fed occasionally if your glider likes them.
My pair won't touch acidic foods like pineapple or tomato, or oranges even for the most part. But they will eat watermelon, cantaloupe or honeydew regularly which all have a high water content and I have never seen any loose stool, diarrhea, or weird colored poo from it.