One treatment controls odors, breaks down waste and cleans tanks and sensors. Now 20% stronger for even better performance, stopping odors for up to 7 days! Convenient, quick-dissolve formula is ready to use just drop in a packet. Economical one packet treats a 40 gal. tank. Formaldehyde-free. Resealable tub for easy storage. Made in USA. | Camco Mega All-In-One Sewer Tank Treatment, 30-pack, Coastal Breeze Made in USA