Product review (5 stars): Huzzah! Solid ice cubes again!
Work perfectly in my Frigidaire fridge/ice maker. My original filter was so clogged with iron/calcium from our hard water and iron pipes that my ice cubes were hollow and the water dispenser was pretty much unusable. I don't know why it didn't occur to me to check the filter, but I'm glad I did. I have ice again! Huzzah!