Aptus Liquid Base is a dual-stage base nutrient designed for use in both vegetative and flower phases. Liquid Base provides the essential macro and micro elements needed for plant growth throughout the vegetative and flowering phases of growth.The ingredients for Liquid Base were intentionally chosen to not include ingredients which cause unnecessary contamination of the growing substrate. Without these ingredients, Liquid Base allows you to feed accurately knowing the true nutrient density of your feeding solution. Liquid Base contains no added calcium and must be used with either MASSBOOST or MINERAL-CALMAG.Dosing Instructions: Regular Feeding 4 - 10 ml per 1 gallon METRIC: Regular Feeding - 1-2 ml per 1L Shop all Aptus Plant Tech products HERE