"These bio-flow drain strips are ultra concentrated for highly effective and powerful cleaning and deodorizing of household drain lines. The bio-flow strip gets inserted into the pipe trap to slowly release a powerful blend of enzymes to digest and liquefy food, grease, soap scum, sludge and other organic matter that tend to clog drain lines. The bio-flow drain strips are safe on all sinks, tubs and shower drains and are beneficial for septic tanks. DIRECTIONS: Very simply drop 1 bio-flow strip into each drain every month.FEATURES Ultra-concentrated strips for powerful cleaning and deodorizing of household drain lines. Smelly drain? bio-flow drain strips will eat away at organic matter better than the no-name drain cleaner you have under your sink. Drop one strip into your drain and the slow-dissolving bacteria and enzymes will start to work instantly Eliminates and digests grease, oil, fats, scum and food quickly for easy drain cleaning. The gunk thats stuck inside of your drain wont stand a chance against bio-flows enzymes. Grease, oil, fats, scum, food: all gone in a matter of minutes. Hows that for easy drain maintenance Utilizes powerful yet slow dissolving enzymes to take care of lodged organic materials. Food and grease will stick to your drain like Velcro. Pretty gross. Luckily you can clear the gunk in your drain with a bio-flow deodorizing strip Safe on all pipes and septic systems (including old pipes and PVC pipes) Perfect as part of a monthly drain cleaning routine. Traditional use: once a month, drop one bio-flow strip into the drain for cleaning and deodorizing. Perfect for kitchen and bathroom drains"