Propane: 20lbs for $13.75 or $2.95 by the Gallon

Bonide Mossmax 32 Oz. Ready To Spray Moss & Algae Killer

Bonide

Fast acting water-based, multipurpose formula works within hours to kill moss, algae, and lichens on lawns, trees, roofs, decks, patios buildings, fences, and walkways. All without staining or damaging desirable plants. Also removes green slime. Potassium soap: 22.11%. 32 oz. quart, ready-to-spray hose end.