Powerful Automatic Cleaning: With Every Flush, Active Bright Blue Toilet Bowl Tablets are working hard to remove stains & odors from your toilet bowl. Each Auto Slow-Release tab works to Refresh & Clean the whole toilet system, use as toilet tank cleaner tablets, toilet cleaner tablets, toilet cleaners for inside the bowl, even internal water pipe and drain Clean & Prevent Grime: Blue Toilet Bowl Cleaners are Hard Water Toilet Ring Remover, Lime Scale Refresher & Calcium Eliminator. Blue water indicates that the cleaners are working behind the scenes! No need to put in effort your self to hand scrub the commode Long-Lasting Toilet Bowl Freshener: Say goodbye to bad odor. Active Toilet Tablets deliver Continuous Cleaning, with an Ultra Fresh Scent for 300 Flushes or more, which lasts up to 30 Days per bathroom (based on best estimate for average household use) Natural Toilet Cleaner Formula: Active Flushable Septic Safe Toilet Bowl Cleaner has the tough cleaning power of commercial grade supplies but free of harsh chemicals. Blue Toilet Bowl Cleaners use only simple ingredients for an effective toliet wash Convenient Bulk Supply: You're good for a year with 12 pack of Concentrated Toilet Cleaner Tablets! Just drop in tablet to tank when blue color fades, and you're set. Compare to other cubes that dissolve quickly or require multiple treatments per month Product Usage Instructions: Remove one tablet from the package and drop it into your toilet tank (not the bowl). Allow it to fully dissolve, turning the water a deep blue. Each flush will keep your toilet fresh and stain-free. Replace the tablet when the color fades for continuous results Active toilet cleaner tablets provide powerful, automatic cleaning in every flush, eliminating manual scrubbing while tackling tough stains, limescale, and odors. Each tablet lasts for up to 30 days or 300 flushes of continuous cleaning, deodorizing, and freshening, leaving your bathroom smelling ultra fresh for up to a year with the 12-month supply. Each package includes 12 Active blue self cleaning toilet tablets.