General Hydroponics Armor Si (0-0-4) is an all-purpose silica supplement that helps plants achieve strong stem and branch structure and foliar development. A healthy, vigorous plant boosts stress tolerance, light absorption, and flower production.
Think of Armor Si as a supplement that supports the foundation of the plant, from leaves to...
Reviews
4.7
6 ratings
5
4
3
2
1
The silica arrived quickly and efficiently and the customer service from happy hydro is phenomenal keep up the excellent work everyone on the happy hydro team highly recommend.
J
Justin · 15 days ago
Plants love it!!!
M
Matt · May 30, 2026
Great product.Packaged well.Fast ship.Easy transaction.
