Review on Alpine Fresh Soft Scrub In-Tank Toilet Cleaner Duo-Cubes - Pack of 2 by Sean Spence

I had this subscribing and saving and oh my god! I have a few that I won't be using now. The product started causing mold in the tank after about two weeks and every time I flushed, chunks of mold slime were floating in my water. For the first month I didn't know what it was and I kept thinking the problem was at the edge of the bowl. Finally, I removed the lid to examine it. I saw that the cube hadn't really dissolved, so I took two long bamboo skewers and poked them to break them up a bit. Dark blue water, but light blue again a few days later and more mold. This went on for several weeks before I was able to pull the piece out and spray the inside of the tank with Clorox Clean Up with Bleach. Mold grew on the sides. Pooh! Finally clear water again.