Pre-measured water soluble pouches combines accuracy and control for maximum performance and cost effectiveness. Usage in RV and marine holding tanks or recirculation toilets, drop pouch directly into holding tank and add appropriate amount of water; or drop ouch into toilet water and then pump into the holding tank. Portable toilets drop one pouch directly into tank and add appropriate amount of water. During hot weather, additional pouches may be required. Follow instructions of toilet and holding tank by manufacturer.