Grodan Gro-Slab Uni-Slab Improved 9.5" x 8" x 4" (16/Case)
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Grodan Gro-Slab Uni-Slab Improved 9.5" x 8" x 4" (16/Case)

Grodan Gro-Slab Uni-Slab Improved 9.5" x 8" x 4" (16/Case)

GrodanSKU: B50316
$ 125.95
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Grodan Gro-Slab Uni-Slab Improved 9.5" x 8" x 4" (16/Case)

The Grodan Gro-Slab Uni-Slab Improved 9.5" x 8" x 4" (16/Case) is a professional stone wool growing slab designed to provide a compact, high-volume root zone for hydroponic and controlled-environment cultivation.

Each Uni-Slab measures approximately 9.5 × 8 × 4 in (24 × 20 × 10 cm) and provides about 4.8 L of substrate volume. Each case contains 16 slabs.

Grodan Improved technology combines an optimized stone wool structure with advanced wetting technology to promote uniform moisture and EC distribution throughout the root zone.

What Is the Grodan Improved Uni-Slab Used For?

The Uni-Slab is designed as a final-stage growing substrate for individual plants or compatible growing blocks.

Its compact footprint and substantial substrate volume provide a larger moisture and root-zone buffer than standard growing blocks while maintaining precise control over irrigation and fertigation.

Key Benefits

  • Professional Grodan Improved stone wool slab.
  • Dimensions: 9.5 × 8 × 4 in.
  • Metric size: approximately 24 × 20 × 10 cm.
  • Approximately 4.8 L of substrate per slab.
  • 16 slabs per case.
  • Vertical fibre orientation.
  • Uniform water and EC distribution.
  • High re-saturation capacity.
  • Suitable for precision irrigation and fertigation.
  • Supports effective root-zone and dry-back management.
  • Designed for hydroponic and controlled-environment cultivation.

Grodan Improved Technology

Grodan Improved Uni-Slabs are engineered to distribute water and nutrients evenly throughout the substrate.

Their improved capillary action helps maintain a more uniform moisture profile while allowing growers to adjust irrigation frequency, volume, EC, and dry-back according to crop requirements.

Why Choose the Uni-Slab Format?

The 9.5 × 8 × 4 in Uni-Slab provides approximately 4.8 L of root-zone volume in a compact format.

Compared with smaller growing blocks, the larger substrate volume offers greater water-holding capacity and additional room for root development while remaining suitable for precision crop steering.

Ideal Applications

The Grodan Improved Uni-Slab is suitable for:

  • Hydroponic cultivation
  • Drip irrigation
  • Precision fertigation
  • Indoor horticulture
  • Commercial greenhouses
  • Controlled-environment agriculture
  • Individual plant production
  • Root-zone steering
  • Flowering and fruiting crops

Product Specifications

Specification Details
Brand Grodan
Product Gro-Slab Uni-Slab Improved
Type Stone wool growing slab
Nominal Size 9.5 × 8 × 4 in
Metric Dimensions Approx. 24 × 20 × 10 cm
Substrate Volume Approx. 4.8 L
Quantity per Case 16 slabs
Fibre Orientation Vertical
Growing Media Stone wool
Primary Use Hydroponic cultivation and root-zone management

How Do You Use the Grodan Uni-Slab?

Fully hydrate and condition the slab according to your nutrient and irrigation program before placing the plant or compatible growing block on top.

During cultivation, adjust irrigation frequency and volume according to plant demand, environmental conditions, water content, EC, and desired dry-back.

Can Growing Blocks Be Used With the Uni-Slab?

Yes. Compatible Grodan growing blocks can be positioned on the Uni-Slab, so established roots can continue developing into the larger stone wool root zone.

What Is the Difference Between a Gro-Block and a Uni-Slab?

A Gro-Block provides a smaller individual root zone, while the Uni-Slab offers approximately 4.8 L of substrate, providing more rooting space and a larger moisture buffer.

The Uni-Slab is therefore well suited to later-stage cultivation where plants require additional root-zone capacity.

Frequently Asked Questions

How many Uni-Slabs are included in a case?
Each case contains 16 slabs.

What are the dimensions?
Each slab measures approximately 9.5 × 8 × 4 in (24 × 20 × 10 cm).

What is the approximate substrate volume?
Each Uni-Slab provides approximately 4.8 L of stone wool substrate.

Can it be used with drip irrigation?
Yes. The Uni-Slab is designed for precision irrigation and fertigation systems.

Can Grodan blocks be placed on the Uni-Slab?
Yes. Compatible rooted growing blocks can be positioned on the slab to provide additional root-zone volume.

Order Confirmation

As soon as your order is placed, an order confirmation will be sent to the email address you used to place the order. This means we have received your order and payment. Payment is captured as soon as the order is placed. In rare cases, if the product is on backorder or unavailable, we will contact you and ask if you would like to wait for the product to become available, switch your product, or have your payment refunded. If the item is available for shipment we will submit the order for processing and arrange shipment. Please see current estimated lead times on the product page for each product.

Shipping

Most products ship within 1 to 3 business days. Some items might take longer as they are delivered from our warehouse in Vancouver. As soon as we receive your tracking number, we will send it over to you.

Free Shipping

Free shipping is available across all provinces throughout Canada for orders over 149$.

International Orders

Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or other couriers. Most quotes can be obtained at checkout. If not, you can email us at info@canadagrowsupplies.com for some more information on shipment. Items shipped internationally from the USA may have VAT, duties, taxes, and/or local charges due at delivery. These charges are the responsibility of the customer and not Canada Grow Supplies Inc.

Cancellations

If you need to cancel your order, we recommend reaching out to us ASAP. We charge a 2.9% (credit card), 3.5% (PayPal), 4.0% (PayPal International), 4.1% (American Express), or 6.5% (Shop Pay Installments or Sezzle) order cancellation fee after the order was received. We can accommodate most requests, but due to the different time zones and schedules that our warehouses ship from, sometimes the cancellation request may not reach the warehouse in time before the product ships. Once the item has been arranged to ship or has shipped, the package will be treated like a 'return' and is subject to ship-back fees and restocking fees. If you purchased 'Route Package Protection', this can not be refunded after the order has shipped.

Returns

In order to make sure you are completely satisfied, we can send you a return label within 14 days of receiving the order. This is to guarantee that you are happy with the product. Some products might require a 10-25% restocking fee. Please visit our full return policy.

Why Canada Grow Supplies?

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1. We’ve had thousands of shipped orders and satisfied customers.

We started our business in 2020 with the intention of creating a one-stop shop for growing supplies without letting customers wait for their orders. We saw the potential to serve customers of this industry way better than they’ve been treated in the past.

2. We’re a small, Canadian, family-owned business.

Our small team overlooks every customer and their orders to ensure they are satisfied with their products. We answer the phone and website chat, and if we don’t, we get back to you within 6 hours or less! We even throw in some freebies at random.

3. Free Discreet Shipping Available in Canada

We offer free shipping on all orders over 149$ Canada-wide. Many companies have a weight limit for free shipping, we don’t!

4. 100% Lowest Price on the Market - Price Match Guarantee

We keep the best prices on the market at all times. If the price respects the companies’ lowest retail price, we will definitely price-match any other Canadian website.

5. Reliable International Shipping

Nearly all of our brands can be shipped internationally using FedEx, UPS, USPS, DHL or similar couriers. Go through the checkout process to receive a shipping quote or contact us if a shipping quote is not available at checkout.

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7. We are authorized resellers with manufacturer’s warranty

You will buy confidently from us since only sell new, official products (no used items or clones). All warranties are new are 100% honored through the respective manufacturer.

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We accept major credit cards and debit cards, PayPal, Google Pay, Apple Pay, Sezzle, bank transfers, and money orders. All card payments are processed through our encrypted SSL security processing system. Your identity is always protected.

9. Hassle-free returns

Just in case your purchase was not up to your standards, we offer return shipping if you are not 100% satisfied for any reason

10. Route Package Protection

Adding Route Package Protection to your order at checkout means that your order is protected against being lost, damaged, or stolen. In the unfortunate instance that you experience one of these inconveniences, you can report an issue with Route and they will work with you to make sure you get the resolution you prefer.

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