Review on Toilet Treatment Drop Ins Self Dissolving by Dave Knain

Two weeks into a four week trip our usual tank treatment was over. I wanted to order a new one but it was out of stock at the time so I bought this product. We've never had any issues with the black tank (smell, sticking, etc.). We have a small 20 gallon black tank and have tried one and then two packs of this product after each reset. She always stank and began to grow into a heap of cigarettes in the aquarium. From what I could see and smell, this product was an expensive inert substance that I added that did nothing positive. When we got home it took a big high pressure flush to put things back in order. We go back to our tried and true remedy and throw it all away.