Nualgi Ponds – Natural Algae Control + Water Clarifier

Rated 4.59 out of 5 based on 230 customer ratings
(244 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:
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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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244 reviews for Nualgi Ponds – Natural Algae Control + Water Clarifier

  1. Rated 5 out of 5

    thomas martin

    This product is amazing I started dosing back in June on my 5th dose now my pond is clear and I can see straight to the bottom Thank you nualgi for a great product.

    • nualgi (verified owner)

      Thanks for the review Thomas! Great to hear you and your pond are loving Nualgi!

  2. Rated 3 out of 5

    Donelle Cushing (verified owner)

    Dose 4 this morning. Doing the 10 % water change on Friday mornings then dose Saturday early morning. Still no change in the beautiful bright green water, I do nit nor have I had string algae just this hard to get rid if single cell… In going to continue treatments in hopes that it will clear my water, I miss seeing my fishies

    • nualgi (verified owner)

      Stay patient Donelle :). You could dose every 5 days instead of 7. In problem ponds, you could also dose Microbe-lift PBL twice per week according to their instructions. Once improvements start you can go back to regular dosing of Nualgi. Stay in touch, we’d like to you to see your fish too!

  3. Rated 5 out of 5

    Dar (verified owner)

    I tried this last year in my 3300 gallon pond. Did not have a great result. I had to use an algaecide to remove the string algae. It was pretty much an ongoing battle. This year I made some changes and cleaned grass etc. away from the edge of the pond. I vacuumed and manually skimmed the pond. I also flush the pond out a little every week. I started using the product about 1 month ago and I am pretty impressed with the results. Not one bit of algae so far and it has been very hot. I have a lot of lichen on my rocks and that is being reduced as well. I did notice when ever I dosed the pond it seemed to put the fishies in the “mood”. There was an awful lot of spawning going on. A koinkydink maybe, but awesome product. My fish are far more active then they have ever been and my water is getting clearer all over he time. And my pond does not smell like a static tank. Thanks Nualgi. I wish Canadian stores would carry this.

    • Anil Nanda (verified owner)

      Thanks Dar. When you improve oxygen levels in the pond the fish can get in the “mood”! When animals feel secure, they spawn. We have many users tell us about spawning when using Nualgi. In aquaculture ponds, we have seen numbers grow from 50k fish to over 100k on maturity. There are stores in Canada carrying it. Please contact neil@prosourcesupply.ca for list of vendors near you

  4. Rated 5 out of 5

    Jesus L. Opiana (verified owner)

    For pond safety i recommend this product you can see the result no worries losing fish.

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