Ty-D-Bol 12 fl. oz. Toilet Bowl Cleaner In-Tank Liquid (6-Pack) 365002.6 - The Home Depot
The building I clean had me put in these blue toilet cleaner things to help with the rings forming but it's creating a blue ring. Any ideas? : r/CleaningTips
Ty-D-Bol Blue Tablets Toilet Bowl Cleaner Value Pack - Shop Toilet Bowl Cleaners at H-E-B