---
product_id: 375353618
title: "BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon"
brand: "biosafe systems"
price: "VT28842"
currency: VUV
in_stock: true
reviews_count: 8
category: "Bio Safe Systems"
url: https://www.desertcart.vu/products/375353618-biosafe-systems-zerotol-hc-broad-spectrum-algaecide-bactericide-and-fungicide
store_origin: VU
region: Vanuatu
---

# OMRI-listed organic-safe formula Residue-free, eco-friendly peroxyacetic acid Broad-spectrum fungicide & bactericide BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon

**Brand:** biosafe systems
**Price:** VT28842
**Availability:** ✅ In Stock

## Summary

> 🌱 Defend your garden with the power of clean, green disease control!

## Quick Answers

- **What is this?** BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon by biosafe systems
- **How much does it cost?** VT28842 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/375353618-biosafe-systems-zerotol-hc-broad-spectrum-algaecide-bactericide-and-fungicide)

## Best For

- biosafe systems enthusiasts

## Why This Product

- Trusted biosafe systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Surface Sanitizer:** Also disinfects greenhouse tools, benches, and hard surfaces to prevent cross-contamination.
- • **Versatile Disease Defense:** Perfect for hydroponics, ornamentals, turf, and edible gardens alike.
- • **On-Contact Pathogen Killer:** Instantly neutralizes mold, mildew, and algae for healthier plants.
- • **Clean & Sustainable Gardening:** Leaves zero toxic residue, supporting organic and green growing practices.
- • **Eco-Conscious Plant Protection:** No copper or harsh chemicals—safe for kids, pets, and the planet.

## Overview

BioSafe Systems ZeroTol HC is a powerful, broad-spectrum algaecide, bactericide, and fungicide formulated with peroxyacetic acid and hydrogen peroxide. OMRI-listed for organic use, it kills plant pathogens on contact without harmful residues or harsh chemicals. Ideal for home gardens, hydroponics, and greenhouses, it promotes healthier plants while sanitizing surfaces to reduce disease spread.

## Description

ZeroTol HC’s specialized formulation partners well with existing pest management practices as an effective fungicide for disease control, protecting plants through colonization. OMRI-Listed for organic use. This broad-spectrum algaecide, bactericide, and fungicide is made with a highly effective combination of peroxyacetic acid and hydrogen peroxide that leaves no toxic residue. GREENHOUSE AND ORNAMENTALS HARD SURFACES Use ZeroTol HC to control algal, fungal, and slime forming bacterial growth on hard surfaces such as: glazing, plastic, pots, flats, trays, cutting tools, benches, work areas, walkways, floors, walls, fan blades, watering systems, coolers, storage rooms, structures, and equipment. A clean environment reduces the risk of cross-contamination of insect pests and plant pathogens that thrive in organic matter and algae. FOLIAR TREATMENTS Use ZeroTol HC to prevent, treat, and control plant diseases on all flowering plants, ornamentals, house plants, vegetable, berry and fruit plants, trees, shrubs, and lawns. ZeroTol HC is ideal to control and suppress diseases like downy mildew, powdery mildew, leaf blight, and Anthracnose. HYDROPONICS AND AQUAPONICS* Treat hydroponic and aquaponic growing systems to control waterborne pathogens such as Pythium and Fusarium. ZeroTol HC helps reduce algae and biofilm in water lines and systems, helping to keep your system cleaner for longer. TURF AND LANDSCAPE Treat turf in well-established lawns to prevent the development and spread of disease and algae. Control landscape, tree, and shrub diseases such as powdery mildew. *Not registered for use in California

Review: Highly effective, great product, does exactly as it states - This is flat out the best product for bud rot in my opinion, and I've tried several different things and products and fixes. Make sure to wear mask and glasses if it's windy at all. Use 5 tsp per gal of water and soak it down (I use a pump sprayer) once every 5 days if you see it or have a problem, you can also use it as a preventative measure too. Great product, can't stress that enough saved me a ton of flower!
Review: Powerdery Mildew is a nightmare once you get it. ZeroTol is the answer. - This stuff is exactly what I needed. Got a nasty Powdery Mildew breakout this past summer in both my grow tents due to the humidity and my own laziness/ignorance. So I killed off a bunch of fully grow plants and sprayed whole tents down with bleach. And of course the PM came back in the next crop, so I killed more plants off. But this time I did some research online grow forums and with ChatGPT to find the answers. This stuff is safe to use directly on plants and will kill the PM. I found myself cleaning the shower mildew with it too. Works great!

## Features

- BROAD-SPECTRUM FUNGICIDE, BACTERICIDE: BioSafe Systems ZeroTol HC, algaecide and bactericide, kills plant pathogens on-contact and prevents disease development. ZeroTol HC is formulated for use around the home, garden, hydroponic system, and grow room to combat powdery mildew, Botrytis, and Pythium.
- NO HARSH CHEMICALS: ZeroTol HC kills fungus and algae without the use of copper or other harsh chemicals. This environmentally friendly acid-based solution leaves no harmful residue so you can have peace of mind using it around kids, pets, and wildlife.
- KILLS PLANT PATHOGENS ON CONTACT: Protect your plants and crops with this fungicide that kills plant diseases on contact. It also helps control waterborne pathogens such as Pythium and Fusarium*.KILLS PLANT PATHOGENS ON CONTACT: Protect your plants and crops with this fungicide that kills plant diseases on contact. It also helps control waterborne pathogens such as Pythium and Fusarium*.
- IMPROVES PLANT HEALTH: ZeroTol HC helps improve overall plant health by promoting stronger roots and stems. It can be used on ornamentals in the landscape, houseplants, vegetables, berries, herbs, edible and flowering plants.
- MULTIPLE USES: Home, hobby, and small hydroponic growers can use ZeroTol HC to control plant diseases on ornamentals in the landscape, houseplants, vegetables, berries, herbs, and other edible plants. This clean chemistry offers a sustainable approach to plant health

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08XDPT2JR |
| Best Sellers Rank | #27,445 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #672 in Pest Repellents |
| Brand | BioSafe Systems |
| Customer Reviews | 4.3 4.3 out of 5 stars (98) |
| Item Form | Spray |
| Item Weight | 1 pounds |
| Item model number | SINGLE 6200-1 |
| Liquid Volume | 1 |
| Manufacturer | BioSafe Systems |
| Product Dimensions | 7 x 5 x 11 inches |
| Target Species | Fungus |
| UPC | 188716000931 810075190045 |

## Product Details

- **Brand:** BioSafe Systems
- **Item Form:** Spray
- **Item Weight:** 1 Pounds
- **Liquid Volume:** 1
- **Target Species:** Fungus

## Images

![BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61QiTCuUbXL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Questions & Answers

**Q: What is the shelf life, once opened, if stored in the dark at room temp?**
A: 3 years.

**Q: How much to use and how often?**
A: You'll want to dilute it down A LOT. A spray bottle that is ~800ml (regular sized bottle) only needs 8ml of zerotol to get the right concentration for cleaning plant trays. (1:100) this jug will last a long time

**Q: will this work on blackspot on roses?**
A: Yes it should, be sure to spray early in the morning but if you don’t think it’s working, try The Amazing Dr. Zyhmes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Highly effective, great product, does exactly as it states
*by A***N on October 29, 2025*

This is flat out the best product for bud rot in my opinion, and I've tried several different things and products and fixes. Make sure to wear mask and glasses if it's windy at all. Use 5 tsp per gal of water and soak it down (I use a pump sprayer) once every 5 days if you see it or have a problem, you can also use it as a preventative measure too. Great product, can't stress that enough saved me a ton of flower!

### ⭐⭐⭐⭐⭐ Powerdery Mildew is a nightmare once you get it. ZeroTol is the answer.
*by O***. on December 23, 2024*

This stuff is exactly what I needed. Got a nasty Powdery Mildew breakout this past summer in both my grow tents due to the humidity and my own laziness/ignorance. So I killed off a bunch of fully grow plants and sprayed whole tents down with bleach. And of course the PM came back in the next crop, so I killed more plants off. But this time I did some research online grow forums and with ChatGPT to find the answers. This stuff is safe to use directly on plants and will kill the PM. I found myself cleaning the shower mildew with it too. Works great!

### ⭐⭐⭐⭐⭐ Worth every dime
*by T***E on August 8, 2025*

Absolutely swear habit. But be careful and always always always wear proper ppe when handling. Eye protection, skin, gloves, sjoe covers. The whole 10 yards. This stuff is nasty on the bad stuff and also 10x as bad on your skin. It's highly concentrated so a respirator might be handy. Follow mic rates properly and don't spray to hard or heavy. You can spray up until harvest w great results. But I recommend a preventative program

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-04*