Camco’s TST Lemon Drop-Ins help control unwanted odors and break
down waste and tissue in your black water holding tank. These
easy-to-use drop-Ins contain a blend of lemon-scented surfactant oils
that trap unwanted odors in your tank, making your camping experience
more enjoyable. TST Lemon is RV and marine approved, does not contain
formaldehyde and is safe for all septic tanks—it's even great for
portable camping toilets!