Auto Top-Up Kit with FlexiTankKeep Your Grow System Topped Up Automatically This kit gives you everything you need to ensure that your grow system doesn't run out of nutrient solution, keeping it topped up with a supply of nutrient from a separate tank. How this Kit Works Many grow systems come with their own integrated reservoirs. Often, these integrated reservoirs are too small to last for longer periods of time, especially during peak flower, when your plants consume more