BIO 5K Moderate Traffic, Moderate Heat BIO 5K is the most concentrated, environmentally safe liquid toilet deodorizer on the market. From normal temperatures to high heat, the all-natural, active ingredients in BIO 5K block the formation of odor causing bacteria before they begin to multiply. These ingredients also break down waste to prevent piling, a main source of odors in portable restrooms. In fact, the active ingredients work to dissolve residual waste that collects on sidewalls and tubing within the tanks, another source of continuous odors. Order Online Request Information What Strength Deodorizer do you need? BIO 3K | BIO 5K | BIO 30g | BIO 60g