Inca Gold toilet and holding tank deodorizer from Douglas Products is formulated to eliminate unpleasant odor, leaving a clean, fresh scent. It is safe for discharge into the sewer system, biodegradable and environmentally friendly. It is available in non-paraformaldehyde, paraformaldehyde and winter antifreeze formulas. The powder concentrate is packaged in pre-measured 1- and 2-ounce foil packets to reduce waste and help control costs. Liquid concentrate is packaged in ready-to-use 2-ounce bottles. Bulk packaging is available in both powder and liquid formulations. 800/789-9969; www.incagoldonline.com.