The Oase 8lb Block, also known as the Bio-Block, offers ongoing bacterial maintenance and is designed to provide time-released addition of beneficial bacteria to your body of water. The bacteria will help maintain a proper biological balance in the water by improving dissolved oxygen (DO) levels and helping to reduce ammonia and nitrite levels, as well as noxious odors caused by hydrogen sulfide, dead plant material, and fish waste. Additionally, these bacteria will help with the continued digestion of organic matter in the sediment. 

Completely safe for all aquatic life, birds, pets and people.

Size Each block weighs 8 pounds.

Treatment
Simply put the 8 lb Block in the body of water or hang from dock or suspend under floating fountain or place in the pond or lake near an aerator or a central location. 
One 8lb Block treats 8 acre-feet of water (2.6 million gallons / 9.8 million liters) 
Following the first treatment, reapply after 30 days and then all treatments after that apply every 60 days.

• Significantly reduces noxious odors caused by hydrogen sulfide, dead plant material and fish waste
• Reduces ammonia and nitrogen levels
• Consumes dead organic sediment Improves dissolved oxygen levels Effective over a wide range of pH conditions and water temperatures
• Treats 8 acre-feet or 2.6 million gallons