UGro Pure Max Air Overview Advice UGro Pure MAX AIR is a 50-litre bag (±5%) of fine coco fibre enriched with perlite (30%). Perlite is a white volcanic mineral with many useful properties, providing excellent aeration and drainage, while still ensuring good water retention. It is sterile, lasts indefinitely and has excellent insulation against temperature fluctuation. Combined with coco fibre, it promotes a balanced growing medium for crops. Advantages of UGro Pure MAX AIR: The lightness of perlite offers roots better conditions for their growing, propagation and strengthening, preventing caking of the substrate. Perlite can retain in its surface up to 3 or 4 times its weight in water, reducing over and under watering losses, and so make all the moisture and nutrients available to plant roots. Perlite is neutral (pH = 7), thus the acidity or alkalinity of the fertilizer solution is not altered. UGro offers two types of structures, UGro Standard and UGro Mix3, created for all types of cultures and with no variation in its quality. Both structures have a low EC level and a buffer effect that helps achieve an optimal absorption while keeping the pH stable. UGro Standard (Plug, Small, XL, Cube and Pure) Made of coco peat in small particles with a low percentage of fibres. It has excellent properties of air and water retention. Low watering frequency. Very high volumetric performance : 1kg of substrate can produce up to 15 litres of hydrated coco. Recommended for short-term/seasonal crops such as tomatoes, cucumbers and peppers. UGro Mix3 (Pot and Slab) Made of 40% of coco peat, 30% of 10cm long fibres and 30% of chips of a maximum size of 1 inch. It has a lower water retention but a greater air retention, leading to better roots respiration. Higher watering frequency than the UGro Standard due to a better drainage and less water retention. Lower volumetric performance than the Standard structure : 1kg of substrate only produces 13 litres of hydrated coco. Long lifespan. It can be reuse for a greater amount of cultures. Recommended for long-term/permanent crops, such as gerbera or roses.