Home Plumbing Waste Instant Fresh Toilet & Holding Tank Treatment (8 fl. oz., Sold as 4 Pack) Marpro Instant Fresh Toilet & Holding Tank Treatment (8 fl. oz., Sold as 4 Pack) $15.49 Instant Fresh Toilet & Holding Tank Treatment (8 fl. oz., Sold as 4 Pack) quantity Add to cart Product Details Product Details 8 fl. oz. Sold 4 Pack Only. Eliminates and prevents holding tank odors. Lubricants drain valves. Formaldehyde-free. Breaks down waste and tissue.
