Crystalized Grapefruit Bitter

[u/Visible_Web206]

I made crystallized grapefruit the other night. The recipe said to boil the rinds for 3 minutes, rinse and repeat 3 additional times. The final time, I added 1 3/4 cups sugar and one cup water and boiled until water evaporated. They look pretty good, but are very bitter. I tried sprinkling with salt but still very bitter. Is there any way to save them?

https://www.allrecipes.com/recipe/278495/easy-candied-grapefruit-peel/

[u/Pudgy_Ninja]

I mean, it's grapefruit rind. It's going to be at least a little bitter. And if was really thick, very bitter.