Elite 91 Silicic Acid Bioactive Silicon, 250 mL

SKU: E91-SA-250
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Elite 91 Product Documents

Elite 91 Silicic Acid SDS

Elite 91 Silicic Acid contains one of the most powerful, concentrated forms of silicic acid ever achieved in a stable liquid form. It boasts an incredible concentration of 4.1% Monosilicic Acid and 1.2% plant available Silicon, 21 different organic L-amino acids, and contains zinc, boron, molybdenum, and manganese for an extra micronutrient boost.

Avaiable Sizes

  • 250 mL
  • 500 mL
  • 1 Liter
  • 4 Liter
  • 20 Liter

Utilizing breakthrough new methods, Elite 91 SILICIC ACID has pushed the chemistry of silicon and its forms to the limit of possibility. It has reached these remarkable concentrations while still remaining a 100% soluble liquid and surpassing even the closest competition. This powerful formulation delivers a stable, concentrated formulation unmatched anywhere else.

Elite 91 SILICIC ACID also contains 21 L-amino acids to push plant health and vigor to even greater heights, making it the new standard for achieving stronger, healthier, hardier, more robust & resilient plant growth.

Silicon is an important but often overlooked component to plant health and growth. It helps increase plant cell strength and structure, increases essential nutrient uptake, boosts the immune system and aids plants in withstanding environmental stresses caused by heat, cold, and drought. It allows plants to reach their full potential in yield, quality, growth, and vigor.

While silicon is one of the most abundant elements on earth, it is rarely in a plant available, a bio-active form known as Monosilicic Acid. In nature, microbes in the soil must slowly break down silicon into Monosilicic Acid. In a controlled garden environment, this key element is often missing and keeps plants from reaching their full genetic potential and optimal health condition.

Elite 91 SILICIC ACID is scientifically proven to feed bio-available Monosilicic Acid right to the plant’s roots and allow them to thrive vigorously. It will help your plants absorb the nutrients they need with more efficiency, build the strength they require and grow to their fullest quality & yielding potential.


Directions for use

Use Elite 91 SILICIC ACID with every feeding from the seedlings/cuttings growth stage up until the 7th or 8th week of the crops fruiting/flowering cycle. Double the standard dosage rate per gallon with root or foliar applications to reduce stretching in the early fruiting/flowering phase.

Do not premix. Always add fresh clean water to the reservoir first, then add Elite 91 SILICIC ACID. Mix well then add remaining fertilizers and additives. pH the final nutrient solution to 5.8 – 6.3 range.

Elite 91 SILICIC ACID is suitable with all soil, soulless, and hydroponic-based growing mediums and can be used in conjunction with any premium quality nutrient and/or fertilizer program.

Do not contaminate the bottle/container with water, dust, dirt or debris. Always use clean & dry measuring instruments when extracting Elite 91 SILICIC ACID from the bottle/container.

Soil, Coco, Hydroponics: 0.5 ML – 1 ML per gallon.

  • Standard Dosage Rate: 3 ML per 5 gallons
  • Aggressive Dosage Rate: 6 ML per 5 gallons

Seedlings/Cuttings: Pre-soak your preferred choice of growing medium in a solution using 0.25 ML – 0.5 ML per gallon of water along with a base nutrient and other additives to boost and protect plant growth. Continue to use the same dosage rate to feed your new starts throughout the rooting phase.

Foliar Spray/Treatment: 1 ML to 2 ML per liter

  • Standard Dosage Rate: 4 ML per gallon
  • Aggressive Dosage Rate: 8 ML per gallon

Spray the entire plant with the lights off. Once or twice a week. Adjust pH as necessary before application


Elite 91 SILICIC ACID serves as an effective surfactant and does not require any additional wetting agents for proper penetration and/or absorption. Elite 91 SILICIC ACID is Non-Toxic and leaves NO residue behind on plant surfaces.

Growers Tip (Optional): In conjunction with foliar applications, add ROOTS with the mixture at a dosage rate of 2 ML – 4 ML per gallon of water, mix well and spray within 24 hours.


E91 Silicic Acid Application & Treatment Rates Based On Bottle Size:

250 ML Bottle @ ~

  • 0.5 ML per gallon will treat 1,892 Liters (500 gallons US) of nutrient solution.
  • 1 ML per gallon will treat 946 Liters (250 gallons US) of nutrient solution.

500 ML Bottle @ ~

  • 0.5 ML per gallon will treat 3,785 Liters (1,000 gallons US) of nutrient solution.
  • 1 ML per gallon will treat 1,892 Liters (500 gallons US) of nutrient solution.

1000 ML Bottle @ ~

  • 0.5 ML per gallon will treat 7,570 Liters (2,000 gallons US) of nutrient solution.
  • 1 ML per gallon will treat 3,785 Liters (1,000 gallons US) of nutrient solution.
Brand Elite 91
SKU E91-SA-250
Weight (lb.) 0.7500
Height (in.)
Width (in.)
Length (in.)
Hazardous Material false
UPC 643462165605
Lead Time 2-3
N-P-K 0-2-1
Nutrient Application Hydroponic and Soil Nutrient
Nutrient Type Inorganic Based
OMRI Certified No
Nutrient Material Type ["Liquid"]

What does Elite 91 Silicic Acid do for plants, and what problem does Elite 91 Silicic Acid solve in a controlled grow environment?

Elite 91 Silicic Acid delivers bio-available Monosilicic Acid directly to plant roots, solving the problem that controlled grow environments lack the soil microbes needed to naturally convert silicon into a plant-usable form. The supplement increases plant cell strength and structure, boosts nutrient uptake efficiency, supports the plant immune system, and helps plants withstand heat, cold, and drought stress. Elite 91 Silicic Acid also includes 21 organic L-amino acids plus zinc, boron, molybdenum, and manganese for additional plant health support.

What is the silicon concentration in Elite 91 Silicic Acid, and what makes the formula stand out from other silicon supplements?

Elite 91 Silicic Acid contains 4.1% Monosilicic Acid and 1.2% plant-available Silicon, which the brand describes as one of the highest concentrations ever achieved in a stable, 100% soluble liquid form. Most silicon products cannot reach these concentrations while remaining fully soluble, making Elite 91 Silicic Acid a more concentrated and immediately plant-available option. The formula also acts as an effective surfactant, so no additional wetting agents are needed for foliar applications.

Is Elite 91 Silicic Acid compatible with hydroponic, coco, and soil growing systems?

Elite 91 Silicic Acid is suitable for all soil, soilless, and hydroponic-based growing mediums and can be used alongside any premium nutrient or fertilizer program. The same dosage range of 0.5 mL to 1 mL per gallon applies across soil, coco, and hydroponic systems. Elite 91 Silicic Acid can also be applied as a foliar spray at 1 mL to 2 mL per liter, adjusted to a pH of 5.8 to 6.3 before application.

During which growth stages should growers use Elite 91 Silicic Acid, and when should growers stop using Elite 91 Silicic Acid?

Elite 91 Silicic Acid should be used with every feeding starting from the seedling and cutting stage through the 7th or 8th week of the fruiting and flowering cycle. For seedlings and cuttings, pre-soak the growing medium at 0.25 mL to 0.5 mL per gallon and continue that rate through the rooting phase. During the early fruiting and flowering phase, doubling the standard dosage rate can help reduce unwanted stretching.

How should growers mix Elite 91 Silicic Acid into a nutrient reservoir to avoid compatibility issues?

Always add fresh clean water to the reservoir first, then add Elite 91 Silicic Acid and mix well before adding remaining fertilizers and additives. Do not premix Elite 91 Silicic Acid with other concentrated nutrients before dilution. After mixing, pH the final nutrient solution to the 5.8 to 6.3 range, and always use clean, dry measuring instruments to avoid contaminating the bottle.

How far will a 250 mL bottle of Elite 91 Silicic Acid go, and what dosage rates apply to that bottle size?

A 250 mL bottle of Elite 91 Silicic Acid will treat approximately 500 gallons (1,892 liters) of nutrient solution at the standard rate of 0.5 mL per gallon, or approximately 250 gallons (946 liters) at the aggressive rate of 1 mL per gallon. For reference, the standard dosage across all growing mediums is 3 mL per 5 gallons, and the aggressive dosage is 6 mL per 5 gallons. Growers who need greater coverage can choose larger sizes including 500 mL, 1 liter, 4 liter, and 20 liter options.

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