12 Pack Duette Automatic In-Tank Toliet Bowl Cleaner Tabs - Each Tablet Lasts Up To 6 Weeks by Duette - HouseChem, Inc

Cleans, sanitizes and deodorizes with powerful blue detergent - all you do is flush!, Safe for plumbing and septic tanks; bowl water is non-toxic to children or pets, Drop single tab into tank - you'll see it instantly start to release detergent, Leaves bowl sanitary & clean-smelling; when color disappears, replace with new tab, Includes Six - 2 packs, Total of 12 Tabs