The Hesi Starter Kits are a good value for the money. You get all of the required nutrition for your plants to thrive - conveniently packaged in one box. For beginners or experienced growers Hesi starter kits are highly recommended. Each kit includes an easy to follow grow schedule. A great way to test Hesi nutrients for the first time! Hydro Kit includes:1 liter Hydro Growth, 1 liter Hydro Bloom, 500 ml PK 13/14, 500 ml Root Complex, 500 ml Power Zyme, 10 ml Super Vit.