Root Zone Management & Algae Control for Grodan® Stone Wool

BioSafe Systems’ Scientific Program for Consistent, Controlled Cannabis Cultivation

In advanced cannabis cultivation, plant health and productivity start in the root zone. Grodan® stone wool is an advanced mineral fiber substrate designed for optimal crop uniformity and efficient water and nutrient distribution.

This substrate is stable, scalable, and highly controllable, making it an optimal choice for commercial cannabis cultivators. As an inorganic media, it lacks inherent natural microbe populations, providing a clean slate. In any growing media, maintaining a clean and balanced root zone is essential for optimal nutrient absorption, robust root development, vigorous growth, and consistent high-yield and high-quality crops. These characteristics of Grodan® stone wool necessitate precision irrigation and root zone management for optimal results.

BioSafe Systems delivers a data-driven, proactive approach to biosecurity and algae suppression. BioSafe Systems program is ideal for cannabis grown in Grodan® stone wool, combining advanced oxidizing products with best-in-class standard operating procedures (SOPs) to support consistent, repeatable production results.

Grodan Stone Wool

Start Clean, Stay Clean

Establishing strong biosecurity practices at the root zone level is essential. Growers who adopt a preventive mindset, prioritizing regular sanitation, staff education, and ongoing monitoring, significantly reduce the risk of microbial imbalances and crop loss. Effective SOPs minimize variability, enhance plant quality, and reinforce system reliability.

Core Sanitation SOPs

Practice

Schedule

Objective

Action

Water Quality Testing

Quarterly

Identify presence of microbial contaminants and inform treatment strategy

Partner with a BioSafe Systems technical specialist for analysis

Chemical Selection

As needed (based on test results)

Optimal water treatment chemistry

Utilize ZeroTol® 2.0 based on system load and contamination level

System Maintenance

Ongoing

Sustain irrigation hygiene and prevent biofilm formation

Sanitize equipment and irrigation lines routinely; log procedures

Treatment Recommendations for Water System Sanitation

Clean irrigation water is vital to preventing the spread of disease and algae. ZeroTol® 2.0 is a fast-acting, broad-spectrum bactericide, fungicide, and algaecide ideal for treating water sources, reservoirs, and delivery systems. Contact BioSafe Systems for water testing prior to implementing a treatment program.

Product

Dilution Rate

Application Timing

Target Organisms

Directions

ZeroTol 2.0

TBD based on testing

Before microbial inoculation, apply weekly or as needed

Zoospores, filamentous algae, cyanobacteria, bacteria

Inject through fertigation or main lines; maintain 7 ppm peroxyacetic acid level

GreenClean® Acid

1:100–1:200
TBD based on testing

Between every cultivation cycle

Biofilm, residual algae, microbial buildup

Charge system with solution, allow sufficient contact time, then flush thoroughly

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SaniDate® 5.0

1:100–1:200
TBD based on texting

Between every cultivation cycle

Biofilm, residual algae, microbial buildup

Charge system with solution, allow sufficient contact time, then flush thoroughly

ZeroTol® 2.0 works across a wide pH range and degrades into oxygen and water, making it a sustainable and low-residue option for ongoing sanitation programs. Its regular use protects infrastructure and plant health by limiting pathogen pressure in the system.

Managing Algae in Inert Substrate Systems

Algae can interfere with water distribution, harbor pathogens, and signal suboptimal irrigation practices. In inert substrates like Grodan® stone wool, where nutrient and water delivery is precisely managed, algae can be controlled proactively.

Targeted Algae Management in Inert Systems: Best Practices

 – Perform line flushes and sanitation between crop cycles

 – Conduct quarterly deep cleans of rooms, trays, and irrigation systems

 – Inject sanitizers directly into irrigation systems for targeted application

 – Avoid chemical incompatibilities by consulting with technical specialists

 – Adjust irrigation scheduling to minimize wet surfaces that promote algae growth

Integrating these practices into the cultivation protocol improves water use efficiency, plant uniformity, and overall facility hygiene.

Remove the Bad, Add the Good

Sanitization using ZeroTol® 2.0 eliminates harmful microbes, creating a neutral environment in the root zone. To establish beneficial microbial communities, apply LIVENTIA™ SSB after sanitization. This sequence enhances colonization efficiency and supports rhizosphere health.

Phase

Input

Application Timing

Procedure

Sanitize Root Zone

ZeroTol® 2.0

Prior to microbial inoculation

Complete all irrigation sanitation steps first; confirm system is flushed and clean

Apply Beneficials

LIVENTIA™ SSB

24 hours post-sanitization

Inject directly into irrigation; avoid extended holding in stock tanks

Stonewool substrates offer significant surface area for root growth and microbial adhesion. Establishing beneficial microbial populations immediately after sanitation leads to improved nutrient uptake, enhanced root function, and a more balanced, resilient root zone environment.

Questions?

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About BioSafe Systems

BioSafe Systems, LLC is a company leading innovations since 1998 for environmentally sustainable practices and products that protect crops, water, and people. Our success hinges on a commitment to customer service, quality research, regulatory compliance, and the willingness to adapt. BioSafe Systems is a family-owned and operated company certified by NQA to ISO 9001:2015, 14001:2015, and 45001:2018, and our products are manufactured proudly in the United States. More about BioSafe Systems