Think of GT Silica as nature's bodyguard for your indoor plants. Silica is naturally abundant outdoors but is largely missing from indoor growing environments — supplementing with it gives your plants the protection and strength that nature would normally provide. It works by strengthening plant cell walls, creating a tougher barrier against pests, fungal infections like mildew, and environmental stressors like heat and drought. Especially useful for variegated plants prone to browning, and a great addition to your regular GT feeding routine. Compatible with soil, LECA, PON, and semi-hydro. Use 2–5ml per litre every time you water. Always add to plain water first, stir well, and rest for 15 minutes before adding your other nutrients.