Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fluidmaster 8300P8 Flush 'N' Sparkle Toilet Bowl Cleaning System

These are exactly what I have been trying to find for a long time. I had checked all the local stores but no one had anything like this. Perfect since there are no chemicals in the tank to affect any of the parts in the tank. All the chemical goes in the bowl. No moving parts to wear out just replace the filters.