The TST MAX Drop-Ins help control unwanted odors and break down waste and tissue in your black water holding tank. The easy to use drop-ins contain a special chemical that helps break down waste. They also have a blend of ocean-scented surfactant oils that trap unwanted odors in your tank, making your camping experience more enjoyable. The drop-ins are RV and marine approved, non-formaldehyde and safe for all septic tanks—they’re even great for portable camping toilets! Each bag comes with (15) drop-ins. 

• Essential for RV Black Water Holding Tanks: Eliminates odors and helps break down waste and tissue in your RV's black water holding tank
• Ultra-Concentrated Formula: The toughest odor stopper; just one drop-in treats up to a 40-gallon tank
• Not Made with Bronopol: Does not contain the toxic, formaldehyde-releasing ingredient bronopol
• Safe for All Septic Tanks: Drop-Ins are RV and marine approved and are 100% biodegradable
• Great Smell: Fresh ocean scent
• Quantity: (15) drop-ins per bag