How much to use and how often?

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

will this work on blackspot on roses?

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

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BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon

BioSafe Systems ZeroTol HC, Broad Spectrum Algaecide, Bactericide, and Fungicide, Peroxyacetic Acid, Kills Mold, Single 6200-1, 1 Gallon

Product ID: 375353618

Details

Brand
BioSafe
Item Form
Spray
Item Weight
16 ounces
Liquid Volume
1
Target Species
Fungus

🌿OMRI-listed organic-safe formula

💧Residue-free peroxyacetic acid blend

🧪Broad-spectrum fungicide & bactericide

$197.91

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Description

🌱 Protect your plants, preserve your peace of mind — the future of clean gardening!

CLEAN SUSTAINABLE - Leaves zero toxic residue, supporting a healthier garden and environment.
ECO FRIENDLY SAFE - No copper or harsh chemicals—perfect for homes with kids, pets & wildlife.
MULTI SURFACE SANITIZER - Controls algae & biofilm on greenhouse surfaces, tools, and irrigation systems.
ON CONTACT PATHOGEN KILLER - Instantly neutralizes fungi, algae & bacteria to protect your plants.
VERSATILE PLANT PROTECTION - Effective on ornamentals, vegetables, berries, herbs, and hydroponic systems.

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 harsh chemicals or toxic residues. Ideal for home gardens, hydroponics, and greenhouse environments, it promotes healthier plants while sanitizing surfaces and water systems to prevent disease and algae buildup.

Specifications

ASIN	B08XDPT2JR
Best Sellers Rank	#45,431 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,099 in Pest Repellents
Brand Name	BioSafe Systems
Customer Reviews	4.3 4.3 out of 5 stars (106)
Included Components	fungicide
Item Form	Spray
Item Type Name	Fungicide
Item Weight	16 ounces
Liquid Volume	1
Manufacturer	BioSafe Systems
Model Number	SINGLE 6200-1
Part Number	SINGLE 6200-1
Target Species	Fungus
UPC	188716000931 810075190045
Unit Count	128.0 Fluid Ounces

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$197.91

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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