Check the listing for details. Advanced Nutrients Rhino Skin 4L. Condition: New. Listed at 82.99 USD. Rhino Skin is a Plant Nutrient Support and Potency Enhancer! Maximizes amounts of trichome and essential oil production! Improves stalk strength to support larger flowers! Silicon increases the rigidity of plant cell walls! Protect your plants WITHOUT using poisons or pesticides! Advanced Nutrients Rhino Skin provides additional silica to strengthen your plant’s stems, leaves and floral structures. A stronger plant produces bigger harvests and is better able to resist insect pests, fungal diseases and harsh conditions.Plants require silica to build cells — it’s the building blocks of your plants! Not only do they accumulate silica, they also store it as foundational support between cells. In fact, some plants contain up to 10% of their weight from silica. The problem is many nutrients and potting media do NOT supply enough silica to MAXIMIZE its benefits.