Nualgi Ponds – Natural Algae Control + Water Clarifier

Rated 4.63 out of 5 based on 259 customer ratings
(273 customer reviews)


Use Nualgi Ponds™ to naturally balance your pond, control algae growth, and get crystal clear water you and your fish will enjoy more!

SKU: nualgiponds Category:
WHOLESALE DISCOUNT – buy a total of 12 bottles or more and receive Special Wholesale Pricing. To apply to the program and view pricing info, go sign-up for our Wholesale Pricing Program.


How Does Nualgi Ponds Work?

Within 3 – 5 hours of applying Nualgi Ponds, a bloom of Diatom algae (the good kind!) will develop. The diatom algae bloom out-compete nuisance algae for CO2, N, P and other nutrients, causing the bad algae to die off. It then locks away some of the harmful nutrients in the new bio mass that is consumed as live food for your fish and zooplankton. The growth of diatoms provides oxygen to bacteria who in turn clean up the waste products of fish and leftovers. The exponential growth of diatoms provides oxygen to bacteria who in turn clean up the waste products of fish and leftovers. This natural process helps clean ponds and make their water sparkling while helping reduce bad odors.

What Are the Benefits of Using Nualgi Ponds?

  • NATURAL ALGAE CONTROL FOR PONDS, WATER GARDENS & FOUNTAINS – Control algae growth and clear green water – without toxic algaecides or expensive UVs!
  • IMPROVE WATER QUALITY & CLARITY – Safely restore missing nutrients & balance your pond’s chemistry for improved water quality and crystal clear water!
  • ELIMINATE OFFENSIVE POND ODORS – Supercharge your pond’s Nitrogen Cycle and puts beneficial bacteria to work cleaning up waste & pond sludge.
  • PROMOTE THE GROWTH OF DIATOMS & ZOOPLANKTON – The diatoms fueled by Nualgi are quickly hunted down and eaten by zooplankton – the preferred live food for your fish!
  • ENHANCE FISH HEALTH, COLOR, AND ACTIVITY – Koi pond owners will see their fish be more active chasing down their free food while health & color improve from a more balanced diet and overall ecosystem.
  • IMPROVE AQUATIC PLANT HEALTH & GROWTH – Water gardeners will see all their aquatic pond plants flourish once your water chemistry is balanced and missing nutrients restored.
  • INCREASE DISSOLVED OXYGEN LEVELS – For many eutrophic ponds, results may be visible by afternoon on the first dose – starting with the bubbling up of oxygen you can see!

How Many Gallons of Water Does Each Size of Nualgi Treat?

Bottle Size Gallons of Water Treated Cost to treat 5,000 Gallons
60 ml 60,000 $2.08
125 ml 125,000 $1.60
250 ml 250,000 $1.40
500 ml 500,000 $1.15
1 L 1,000,000 $0.97
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273 reviews for Nualgi Ponds – Natural Algae Control + Water Clarifier

  1. Rated 5 out of 5

    jonh H

    Great Product
    Great Really does remove Algae Pond is crystal clear

  2. Rated 5 out of 5

    Dale Nygaard

    Fantastic product!

    I ran out last year and just purchased more as my koi pond was overrun with string algae and the fish were hiding all the time. Within 2 hours of treating the water, the fish were out swimming around freely like I hadn’t seen in months!

  3. Rated 5 out of 5

    Rich DelGiorno

    This stuff works great!! It works perfect for my small backyard pond. My fish are happy. I bought a small pond heater for the winter and the pond is still clear and the fish are thriving. So happy I found Nualgi Ponds!

  4. Rated 5 out of 5


    Great Results!

    This is safe and easy to use. It will help recover your water clarity and limit the string algae.

  5. Rated 5 out of 5

    Michael A King

    It Works!

  6. Rated 5 out of 5


    Solved the string algae problem.

    My pond was filled with string algae, but Nualgi resolved the problem very quickly. Very reliable product

  7. Rated 5 out of 5


    Great product. Kept my 5000 gallon clear all summer,and saved money as to the other product I was using…Microlift

  8. Rated 5 out of 5


    It takes so little and works wonders!

  9. Rated 5 out of 5



    Excellent product, pond water went from green to very clear, less than a week’s time!

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