Blagdon Pond Grenade Pack of 3Keep your pond sparkling and healthy with Blagdon Pond Grenade, a powerful, natural water treatment designed for effortless pond care. Each grenade combines fastacting bacteria and enzymes to break down organic waste, ammonia and nitritesleaving you with clearer, fresher water. Key Features: Treats up to 5,000 L per grenade this 3pack treats a total of 15,000 L (1,100 gal per unit) Safe and effective biology uses natural, nontoxic bacteria and enzymes