Professor’s Nutrients - Premium Coco 5kg Brick – Compressed RHP Certified Substrate

Professor’s Nutrients - Premium Coco 5kg Brick – Compressed RHP Certified Substrate

For growers looking to maximise storage efficiency and reduce shipping costs without sacrificing media quality, the Professor’s Nutrients Premium Coco 5kg Brick is the ultimate choice. This product contains the exact same world-class, RHP certified, 100% Pure Blend coco coir found in the premium 50L loose bags. Compressed for ultimate portability, this 5kg block is cleverly split into two independent 2.5kg halves wrapped securely together, allowing you to hydrate only what you need. Upon expansion, this single brick yields an impressive 60+ litres of airy, clean, and pre-buffered growing medium, giving your root systems the optimal environment for explosive development.

Best For: Space-conscious growers, remote or rural delivery orders, commercial operations looking to minimise storage footprints, and high-performance hydroponic cultivation.

Key Features

• RHP Certified Premium Quality: Guaranteed to be entirely free from pathogenic germs, soil-borne diseases, weeds, and heavy metals. This professional horticultural standard ensures an ultra-clean, consistent crop cycle every time.
• Smart Split 2-in-1 Design: Comprises two separate 2.5kg bricks wrapped as one. This allows you to break off and rehydrate exactly half the brick (approx. 30L) while keeping the remaining half completely dry and neatly stored for later use.
• Massive 60+ Litre Expansion: Despite its compact, lightweight shipping profile, a full 5kg brick rapidly expands to deliver over 60 litres of premium-grade, loose coco coir when water is added.
• Washed & Pre-Buffered: Thoroughly processed to rinse out excess sodium and potassium salts. The pre-buffering ensures the cation exchange sites are charged with Calcium and Magnesium, eliminating early-stage nutrient lockout.
• High Water Absorption & Aeration: Naturally retains moisture and dissolved nutrients while maintaining an open, fibrous structure that allows oxygen to flood the root zone, preventing root rot and over-watering issues.
• Stable Hydroponic Baseline: Features an ultra-low background EC and a stable pH baseline (5.5 - 6.5), giving you a neutral "blank canvas" to dial in your specific nutrient solution.

Specifications

• Brand: Professor’s Nutrients
• Weight: 5kg (Composed of 2 x 2.5kg halves)
• Expanded Volume: Over 60 Litres of loose coir per brick
• pH Range: 5.5 – 6.5
• Certification: RHP Certified for Commercial Horticulture
• Material: 100% Natural, Eco-Friendly Coconut Husk Coir

Hydration & Usage Tips

• The Rehydration Process: Place a 2.5kg or 5kg block inside a large tub or a clean wheelbarrow. Slowly add warm water to accelerate expansion. A full 5kg brick will require roughly 20–25 litres of water to fully hydrate and fluff up.
• Charging the Medium: While expanding the brick with plain water works perfectly, you can give your plants a head start by hydrating the block using a very weak, half-strength nutrient solution mixed with a premium root stimulant. This immediately "charges" the media with bio-available nutrients.
• Runoff Management: When growing in pure coco, always aim for a 10–20% runoff with each liquid feed. This flushes away any built-up mineral salts from the pot and ensures fresh oxygen is continuously drawn into the root network.
• Perlite Blending: For an even faster-draining media suited for high-frequency automated dripper systems, blend the expanded coco with 30% premium perlite. This creates an ultra-aerated mix that is almost impossible to over-water.

Ideal For (Uses)

• Commercial Facilities: Minimising warehouse storage space, as compressed bricks take up a fraction of the pallet space compared to loose-fill bags.
• Run-to-Waste Hydroponics: Providing a sterile, reliable substrate for automated drip and flood irrigation systems.
• Cloning & Potting Up: An ideal, pathogen-free medium for introducing unrooted cuttings or transplanting young seedlings into their final pots.