Check the listing for details. VIVOSUN Nutrients Base A(4-0-1) B(1-4-2) Bundle Fertilizer for Hydroponic Plant. Condition: New. Listed at 18.99 USD. About this item The Perfect Combination: This two-part base nutrient system delivers a concentrated blend of holistic macro and micronutrients tailored to fuel plant growth from vegetative development right through the flowering stage Rich Nutrient Elements: This bundle contains a rich spectrum of key elements - nitrogen, phosphorus, potassium, calcium, magnesium and more; Together they deliver comprehensive nutrition to promote robust growth at every stage while eliminating risks of nutrient deficiencies Increase Your Yield: This 100% water-soluble nutrient base kit stabilizes the pH of the nutrient solution and improves nutrient absorption for optimal growth, yield and fruit quality; For optimal results, use during each watering session Great Compatibility: The product is compatible with all growing media, including soil, hydroponics, aquaponics and coco coir cultures; It provides comprehensive nutrients for plants, vegetables, flowers, herbs, and more Easy to Use: From seed to harvest, you’ll only need two bottles, no complicated nutrient planning required; Use equal parts of Base A and B, diluted separately then combined to maintain efficacy (NOTE: Bases A and B should not be mixed in concentrated form, and should always be diluted in water separately)