Crystal Blue Muck Doctor XL 4 lb

• Beach and dock area muck removal
• Safely breaks down muck and dead vegetation by super charging naturally occurring bacteria
• 100% safe for humans, fish, livestock, pets, birds, swimming, consumption and irrigation
• 1 box (10 spikes) treats approximately 50 feet of shoreline or 250 square feet
• Most active in water temps above 60 Fahrenheit