Disappointment

After cutting open this grapefruit, I felt cheated. The tree must have been in the middle of a cow pasture.

I found this info online:

THICK SKIN ON CITRUS FRUIT SYMPTOMS

When you have thick skin on the fruit of a healthy citrus tree it is usually an indication of a nutritional imbalance. This is normally caused by too much nitrogen and not enough potash. This is a common problem where animal manure has been completely substituted for a complete fertilizer.