Review on Air Jungles Automatic Toilet Cleaner Tablets with Bleach (8 Packs): Extra Fresh, Septic Safe, Quick Bubbles, Long-lasting by Ray Reeltalk

I used these to add bleach to toilet water to combat drain fly infestations. They drink from a bowl and unlike dogs, simply closing the lid won't save them. I got these little pills to make bleach inedible for her. The blue color lets you know when the tablet is empty, so you know it needs to be replaced. I also liked that they didn't give off a strong bleach smell. They didn't affect the color or cleanliness of the shells but I think they helped with my fly campaign. They are very small, much smaller than other tablets I've seen, so don't last as long. It didn't bother me as I don't plan to keep using them after that, but if you've had a lot of toilets (we have 3) and wanted to use them all the time, they're probably relatively expensive.