Walex TOI-61776 Elemonate Grey Water Deodorizer and Cleaner (Quantity 4) 4 PACK Tank Size: 50 Gallon Unit Size: 32 Gram The Triple Action Deodorizes Grey Tank, Freshens Sink And Drain Lines, And Dissolves Grease And Organic Sludge Freshens Sink And Drain Lines With A Fresh Lemon Scent