Oase’s Pond Block is an all natural, non-chemical approach to reducing sludge, improving water quality and clarity in large ponds, lakes and dugouts. The Pond Block contains several different strains of beneficial bacteria and enzymes that are specialized to break down pond muck and organic sediments. The unique design of the block allows these beneficial bacteria to be slowly released providing a long lasting treatment that works for 60 days.

Oase’s 8 lb Pond Block is the largest available on the market, 60% bigger than the competition, treating a whopping 8 acre feet (2.6 million gallons). The billions of beneficial bacteria contained in 1 block will treat a 1 acre pond that averages 8′ deep for up to 60 days.

• Long Lasting
• Cleans & Clears Ponds
• Easy to Apply
• Digests Sludge & Muck

• Natural Pond Cleaning: Contains billions of beneficial bacteria and enzymes that naturally clean your pond, improve water clarity and digest organic matter.
• Slow Release Formula: The slow release formula steadily releases beneficial bacteria and enzymes for up to 60 days, reducing pond maintenance.
• Reduces Odours: Significantly reduces noxious odors caused by hydrogen sulfide, dead plant material and fish waste.
• Improves Water Quality: Maintains proper biological balance by improving dissolved oxygen levels and reducing ammonia and nitrogen levels.
• Reduces Phosphates: Effectively reduces phosphates that cause excessive weed growth and algae blooms by reducing sludge and organic matter.
• Fish & Wildlife Friendly: Since Oase’s Pond Block is a completely natural product, it is completely safe for your fish, plants, pets and pond wildlife when used in accordance with label directions.
• Easy to Use: Convenient and easy-to-use slow-release formula that lasts 30-60 days, requiring minimal maintenance.
• Easy Application: For best results and maximum dispersion, use the included mesh sock to suspend or anchor it near an aerator, fountain or an area water movement. Remove the mesh sock from the pond once the block dissolves.

Oase’s Pond Block can be placed on the bottom of your pond, however, it is most effective when placed in an area where there is moving water or slight current. Ideally it can be suspended from a dock or large floating fountain, or placed on the bottom of the pond near a sub surface aeration diffuser.

If placing the Pond Block on the bottom of the pond, try to avoid areas with deep sludge, as the effectiveness could be reduced if buried deep in the layer of sediment..

• Apply when the water temperature is 60 F or above.
• Apply by suspending from a dock or floating fountain, or placing in an area with a gentle current
• For best results, re-apply 30 days after the initial treatment, then every 60 days.

For highly eutrophic ponds that have high nutrient loads causing excessive weed growth, algae blooms and have a thick sludge layer you can apply more than the recommended dosage.