Pro Liquids MonoSil Stabilized Monosilicic Acid (OSA) 100ml

MONOSIL is a stabilized monosilicic acid (orthosilicic acid, H4SiO4) solution formulated to provide plant-available silicon in a highly bioavailable form. Silicon is a beneficial element that supports plant structural integrity and helps plants manage environmental stress. MONOSIL is suitable for use in hydroponic, soilless, and soil-based cultivation systems when used as directed. 

Advantages

• High bioavailability and rapid uptake — Unlike many other silicon sources (e.g., silicates or insoluble forms like silica sand), stabilized monosilicic acid is the form plants naturally absorb most efficiently. This allows for quick and direct assimilation through roots or foliage, providing faster benefits without the precipitation or pH issues common in less stable products.
• Strengthens plant structure — Silicon deposits in cell walls, stems, leaves, and roots, creating thicker, more rigid tissues. This leads to stronger stems that better support heavy fruits/flowers, improved overall architecture, and reduced lodging or breakage.
• Enhanced resistance to environmental stresses — It helps plants better tolerate abiotic stresses like drought, heat, salinity, cold/freezing, and nutrient imbalances by improving water-use efficiency, reducing transpiration losses, maintaining turgor pressure, and boosting recovery (e.g., higher photosynthetic rates under stress).
• Improved defense against pests and diseases — Silicon fortifies epidermal layers, increases leaf hairs/trichomes, and creates a physical barrier that makes it harder for pathogens (fungal, bacterial) and pests (e.g., aphids, biting/sucking insects) to penetrate or feed, often reducing incidence and severity without relying solely on chemicals.
• Better nutrient uptake and efficiency — It supports stronger root systems and optimizes absorption/utilization of essential nutrients (including calcium and others), leading to more balanced growth and potentially higher biomass.
• Versatile application across systems — Compatible with hydroponic, soilless, and soil-based setups when used as directed, making it ideal for controlled environments where natural soil silicon may be limited or inconsistent.
• Potential for higher yields and quality — By promoting vigorous growth, larger leaves, increased photosynthesis, and stress resilience, it often results in improved crop performance, including better fruit/flower quality, firmness, flavor/aroma traits, and overall productivity.

Application

FERTIGATION - Delivered through an irrigation system, fertigation feeds plants while you water. This method ensures even distribution of nutrients directly to the root zone, making it efficient for larger gardens or automated systems.

FOLIAR - Apply directly to the leaves using a sprayer. This method allows for rapid nutrient absorption through the leaf surface, providing quick corrective action for deficiencies and boosting plant vitality during key growth stages.

SOIL DRENCH - Pour the diluted solution around the base of the plant to soak into the root zone. This deep-feeding method nourishes roots directly and is ideal for systemic nutrient uptake and long-term plant health.

TOP WATERING - Apply the solution manually over the soil surface with a watering can or hose. As water moves downward, nutrients are carried through the root zone, making this an easy, effective feeding method for container or in-ground plants.

Contains Beneficial Substance(s)

Monosilicic Acid (H4SiO4).............2.7% 
Derived From: Monosilicic Acid (Orthosilicic Acid)

Form: Liquid Concentrate 

Directions for Use

Apply as part of a complete nutrient program. Always premix into water before adding other nutrients. Adjust pH as needed after mixing. Do not mix concentrate with calcium products. Always dilute into water first.

Notes

Conduct a compatibility test (jar test) when mixing with other products. Maintain nutrient solution pH between 5.8 - 6.5.

Safe Handling & Precautions

KEEP OUT OF REACH OF CHILDREN AND PETS

• Avoid breathing dust; use in a well-ventilated area.
• Wear gloves and eye protection when handling.
• Wash hands thoroughly after use.
• Store in a sealed container, in a cool, dry place.
• Keep out of reach of children and pets.

Warning

Causes skin and eye irritation. Harmful if swallowed or inhaled. In case of contact, rinse with water and seek medical attention if needed.

Heavy Metals Compliance

Information regarding the contents and levels of metals in this product is available on the internet at
http://www.aapfco.org/metals.htm.