Get Rid Of String Algae For Good!

UV Lights Don’t Work on String Algae. Nualgi does!

UV clarifiers only kill algae that passes through the bulb. Since string algae also known as “blanket weed”  is attached to surfaces, it never enters the filter.

Nualgi Pond Sludge Remover Kit: a Green Bag and Two Bottles on a Concrete Surface Outdoors.
Fish Pond

The natural way to get a beautifully clear and healthy pond.

Nualgi’s family of products work to create a safe, crystal-clear pond, naturally, so you can enjoy your outdoor oasis with less work.

Eliminate the use of harmful algaecides, expensive UV filters and spot-treating. Nualgi products are 100% safe for the environment and all aquatic life including plants and pets.

Nualgi Ponds & Beneficial Bacteria

Nualgi Natural Pond Cleaner

Nualgi Beneficial Bacteria

Nualgi Sludge Remover

Nualgi Organic Digester

How to get rid of string algae for good!

With a little patience and the right combination of Nualgi products, you can enjoy crystal clear, algea free pond water, naturally.

Get Crystal Clear Water, Naturally

Unleash the power of nature!

Clear Pond

No more harmful algaecides.

Instead of killing algae, Nualgi promotes the growth of diatoms - Mother Nature’s favorite microscopic cleaners - to recalibrate your pond chemistry & improve the health of the entire ecosystem.

Koi Pond

Say goodbye to expensive UV fIlters.

Man-made pond chemicals & UV sterilizers create a dependency that actually weakens your pond biology & prevents natural water chemistry from balancing. For natural, safe & effective help with algae control and the production of beneficial, sludge-eating bacteria, include the all-natural Nualgi line-up in your pond.

Koi Pond

Customer support you can trust.

We’ve helped thousands of pond lovers over the years achieve the crystal-clear, hassle-free pond of their dreams. When you’re stuck with a problem, we’re here to help with our award-winning troubleshooting service. 

Don't just take our word for it...

"I put the first dose in my pond on Tuesday and two days later I can already see a difference. A lot harder for my fish to hide from me now!"
Amrita R.
“Finally found something that will keep my pond clear. Working great up to this point. So easy to use and great results. So glad I found Nualgi. Would recommend it in an instant."
Joe T.
“This stuff is truly amazing!!! I have used it for 2 years now–just ordered some for my aquarium—don’t know why i waited so long!!!”
Gail S.
Backyard Pond

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Have a pond question?

Our Pond Blog and Pond Help pages are full of helpful resources to make managing your pond easier.

If you’re still struggling, don’t hesitate to reach out to our team of Pond Experts.