5195 Flo-Zyme Commercial Bio-Enzyme Drain OpenerDeoderizer with Pleasant Scent, 1 Gallon Bottle, Milky White

Flo-Zyme appears to be a positive overall choice for organic buildup clogging, maintenance and odor issues in drains. It doesn't work well on other types of clogs such as hair or non-organic materials. It can be used for septic tanks and to remove pet stains in carpets. Directions are easy to follow, and it should be left in overnight but not with any water until morning. Some of the issues it resolved include a bathroom sink, and a kitchen drain that kept clogging, which was fixed after using it for about a year. One reviewer used it for a clogged shower drain and it worked very effectively. On the other hand, some reviewers were not satisfied, although most were positive. 78% of Amazon customers have given it 4 or 5 stars, and only 7% gave it 1 or 2 stars.