EFFICIENTLY CLEAN: Vacplus toilet bowl cleaners can efficiently eliminate limescale, rust stains, and other stubborn dirt in water tanks, water pipes, and other parts of toilet bowls with every single flush. | LONG-LASTING EFFECT: With the sustained-release technology, each Vacplus splash toilet cleaner can continuously clean the toilet for up to 15 days with 20 flushes a day. With 20 packs for replacement, Vacplus toilet cleaner tablets can keep the toilet bowl clean and fresh for over 10 months. Additionally, the lifetime of each toilet tablet may vary with the frequency of flushes. | EASY OPERATION: Vacplus toilet tank cleaner tablets are super easy to use. Simply take out one tablet from the box and drop it into the toilet tank. Then, leave it to dissolve sufficiently for at least 1 hours and you will enjoy a clean and fresh toilet. | NEUTRAL INGREDIENTS: The neutral and mild formulas enable Vacplus toilet bowl cleaners to thoroughly clean toilet bowls without damaging any metal or plastic parts in the plumbing or septic tank system, making toilet cleaning easy and hassle-free. | IMPORTANT NOTES: 1) Vacplus toilet tank cleaner tablets can reduce the accumulation of dirt in the toilet but are not replacements for toilet brushes. Thus, please clean the toilet with a brush before the first use to make good use of the product. 2) When the toilet cleaner tablet dissolves completely, please replace it with a new tablet.