Free Shipping on orders over $99 to the lower 48 states Some exclusions apply.*

Product Highlights
  • Effective all-natural treatment for both string algae and green water algae.
  • 100% safe for all pond inhabitants.
  • Ideal pond treatment, especially in warm water. No more need for strong chemical algaecides!
  • Improves biofiltration, water clarity, fish health, and even aquatic plant growth!
  • Balances the nitrogen cycle within your pond, reducing pond odors and overall maintenance.
  • Great value: Apply only 1 ml. per 1,000 gallons of water weekly.
  • Allow up to 4-8 weeks for complete results!

Nualgi Pond Water Treatment | All-Natural | 4 Sizes

  • Effective all-natural treatment for both string algae and green water algae.
  • 100% safe for all pond inhabitants.
  • Ideal pond treatment, especially in warm water. No more need for strong chemical algaecides!
  • Improves biofiltration, water clarity, fish health, and even aquatic plant growth!
  • Balances the nitrogen cycle within your pond, reducing pond odors and overall maintenance.
  • Great value: Apply only 1 ml. per 1,000 gallons of water weekly.
  • Allow up to 4-8 weeks for complete results!
Pond and Garden Depot  |  SKU: POT-NP-003

Nualgi Pond Water Treatment | All-Natural | 4 Sizes

$30.00
Shipping calculated at checkout.

Get Free Shipping

You are only $99.00 away from free shipping to the lower 48 states!

Size

Please Note

Nualgi is a 100% natural algae control product and therefore takes more time to be effective than harsh chemical algae treatments. Please allow a minimum of 4 weeks for results and 8 weeks of treatments for Nualgi to have full effect. In addition, no product can by itself solve an algae problem if the pond is overstocked with fish and has inadequate filtration.

Nualgi Ponds is a natural alternative to algaecides & other toxic water treatments used to control & remove pond algae. This innovative approach to natural pond care and algae control works by restoring balance to your pond's nitrogen cycle and supercharging your pond's biofilter from the ground up!

BENEFITS: Increases oxygen levels & improves water quality & clarity to reduce & control pond algae and foul odors, Nualgi promotes greater fish and plant health, while keeping the water crystal clear. Enjoy your new habitat and show off your pond as your fish become more active and your plants gain more color.

What is NUALGI? Based on over 15 years of research, Nualgi is the fourth generation of a patented nano-silica-based micro-nutrient supplement for all types of ponds, lakes & water gardens. Based on 9 years of lab research and 8 years of field research for applications in commercial and municipal water management. The Nualgi formulation specifically helps pond owners improve water quality and manage algae on a much smaller scale.

How does it work? Within 3–5 hours of applying Nualgi, a bloom of diatom algae (the good kind!) will develop. The diatom algae bloom out-competes 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 biomass that is consumed as live food by fish and zooplankton. By kick-starting this natural process, the diatom algae outcompete the nuisance algae for nutrients, thus starving and eventually eliminating the vast majority of the bad algae from your pond, creating pristine, clear water!

Nualgi Pond Dosing Instructions

Standard Dose: 1 ml per 1,000 gallons of pond water every 7 days.

Quick Dose Reference

Pond Size Nualgi Dose Frequency
1,000 gallons 1 ml Every 7 days
2,500 gallons 2.5 ml Every 7 days
5,000 gallons 5 ml Every 7 days
10,000 gallons 10 ml Every 7 days
25,000 gallons 25 ml Every 7 days

Temperature-Based Dosing

Water Temperature Dosing Schedule
Above 60°F Dose weekly
50°F – 59°F Dose every 2 weeks
40°F – 49°F Dose once per month
Below 40°F No dosing necessary

Application Tips

  • Shake the bottle well before measuring.
  • Dilute the measured dose in a bucket of pond water.
  • Pour into high-flow areas such as near a skimmer, waterfall, or around the pond perimeter.
  • Turn off UV clarifiers and ionizers when dosing, as they may neutralize the product.

Heavy Algae Protocol

If algae covers more than 20% of the pond, dose every 5 days until algae reduces to about 10%, then resume weekly dosing.

What to Expect

  • Results may take 3–70 days depending on pond conditions.
  • Suspended algae (green water) may temporarily increase before clearing.
  • If no results are seen after 4 weeks, review pond conditions.