Walex Bio-Pak Natural Black Water Enzyme Drop-Ins offer an easy, mess-free solution for managing waste and controlling odors in your RV or marine waste tank. Simply drop one in to instantly start breaking down waste and toilet paper with an eco-friendly formula. Continuous use keeps your plumbing trouble-free.

• Eliminates odors and breaks down waste and toilet paper
• No biocides, formaldehyde, zinc, or copper
• Safe for septic systems
• Complies with California regulations
• Keeps tank clean and fresh
• Ideal for RV and marine holding tanks
• 10 pack of drop ins with tropical Breeze scent
• Treats up to 50 gallon holding tank