---
product_id: 107473470
title: "Hydrothol Aquatic Herbicide 20# Bag- Endothol 11%"
brand: "united phosphorus inc"
price: "€ 199.03"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/107473470-hydrothol-aquatic-herbicide-20-bag-endothol-11
store_origin: IE
region: Ireland
---

# Endothall 11.2% 20# Bag Size Weed Control Power Hydrothol Aquatic Herbicide 20# Bag- Endothol 11%

**Brand:** united phosphorus inc
**Price:** € 199.03
**Availability:** ✅ In Stock

## Summary

> 🌿 Dive into Clarity with Hydrothol!

## Quick Answers

- **What is this?** Hydrothol Aquatic Herbicide 20# Bag- Endothol 11% by united phosphorus inc
- **How much does it cost?** € 199.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/107473470-hydrothol-aquatic-herbicide-20-bag-endothol-11)

## Best For

- united phosphorus inc enthusiasts

## Why This Product

- Trusted united phosphorus inc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Large Coverage:** One 20# bag covers extensive areas, maximizing efficiency.
- • **Professional Grade:** Trusted by experts for reliable aquatic management.
- • **Conquer Aquatic Weeds:** Harness the power of Endothall for effective control.
- • **Versatile Application:** Perfect for drainage canals, lakes, and ponds.
- • **Eco-Conscious Solution:** Targeted action minimizes impact on non-target species.

## Overview

Hydrothol Aquatic Herbicide is a professional-grade solution containing 11.2% Endothall, designed for effective control of aquatic weeds in drainage canals, lakes, and ponds. The 20# bag offers extensive coverage, making it an essential tool for maintaining clear and healthy water bodies.

## Description

Hydrothol Aquatic Herbicide 20# Bag- Endothol 11%

## Features

- Endothall 11.2%
- Drainage canals, lakes and ponds
- Aquatic Weed Control

## Product Details

- **Brand:** United Phosphorus Inc
- **Item Weight:** 20 Pounds
- **Liquid Volume:** 9463.52 Milliliters
- **Item Form:** Granules
- **Active Ingredients:** Herbicide

## Images

![Hydrothol Aquatic Herbicide 20# Bag- Endothol 11% - Image 1](https://m.media-amazon.com/images/I/71WYmtf4dlL.jpg)

## Questions & Answers

**Q: Does this kill water shield, cat tails, willows and algae ?**
A: Hi...yes it does kill water shield, cat tails and other water vegatation as long as you get it spread in close proximity to the base of those plants...not sure about the willows, suspect not because they are above the water.  I prefer to keep a little patch of ws and ct so I carefully spreading the granular product allowing me to do that.  For algea no...different type of animal...I used Cutrine Plus...spray on algea after it forms...works great other than I have to spray it 4-5 times during the year to keep it under control.  Looking for a different product that you toss in and it prevents the algea from starting.

**Q: Will this kill Hydrilla?**
A: I used this for leafy pond grass and it kills numerous other. It also takes care of algae.
My pond has never looked as clean as it does now.

**Q: Do you just throw it in on the algae? I'm asking because mine is broken up in sections I already applied another product and it helped a little but I**
A: That is what we did.  This stuff sinks and gets to the roots.. about a week Lily pads started to look burnt and drying up.

**Q: River application + I live o. A river in Maine, will this work on weeds under the water?**
A: Hydrotho Granular aquatic herbicide and algaecide for ponds provides rapid-acting contact control for submerged weeds and algae. Hydrothol even works where there is moving water such as a canal or bay area. Hydrothol can be used in combination, in rotation or as an alternative to copper for control of algae. Dosage rates vary depending on what type of algae or weed is being treated and the density of the infestation.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by T***N on June 9, 2025*

Order received on time and in good condition. Seems to work fine.

### ⭐⭐⭐⭐⭐ Hydrosol pond weed killer
*by K***H on May 21, 2025*

Hydrosol pond weed killer. Use this to control weed growth in my pond. Safe for fish, animals and humans.

### ⭐⭐⭐⭐ Weeds gone
*by C***N on July 1, 2025*

Why did you pick this product vs others?:Works great on lake weeds. Unfortunately expensive and takes a full bag to do the job.

## Frequently Bought Together

- Hydrothol Aquatic Herbicide 20# Bag- Endothol 11%
- Airmax MuckAway Natural Beneficial Bacteria for Outdoor Ponds & Lakes, Muck, Sludge & Noxious Odor Solution, Easy to use Enzyme Tablets, Cleaner Beach & Shoreline, Fish, Pet & Wildlife Safe, 8 Scoops
- Cutrine-Plus Granulated Algaecide - 30 lbs. Professional-Grade Algae Killer for Lakes & Ponds, EPA Approved to Control All Types of Algae (Planktonic, Filamentous, and Chara)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-14*