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Holding tank deodorizer and portion control system. 10 Packs per retail bag. Formaldehyde-freeBiodegradableNon-staining colorDissolves quicklyBreaks down waste & paperLubricates valves & sealsLong-term odor controlQuick dispersion in holding tankNo skin contact when handlingLong shelf lifePre-package portion control - no spills!One Porta-Pak® controls odor on holding tanks up to 40 gallonsAlso effective in treating gray waste waterSlide zipper bag for easy storageApproved for use in California