float-valve-V1 - for auto nutrient level control for passive hydroponics Float valve is a water level controller used in Passive Hydroponics systems. Install a big nutrient tank that can supply nutrients for a month for your plants. Connect a pipe form the nutrient tank to the float valve. Place the float value at the base of the growth tank for plants or vegetable. The float valve will control water level not to exceed 20 mm. This is to avoid drowning the roots and keep enough space above water for airing the roots for healthy growth. When the nutrient level drops below 20 mm, the float valve will fall allowing nutrient to flow from the nutrient tank into the growth tank to be consumed by the plants. No electricity nor pumps required in this passive Hydroponics arrangement. The only additional ingrediant you need is either natural sunlight or indoor grow lamps that could be LED grow lights. The following original design files are included for you to custimize the design for your own need. 3D printing instructions for Ender3 Pro : Take defaults for PLA material with these adjustments: Infill 40%, Support off. The inlet pipe printed may not be durable enough. You may need to replace that with a 4.7mm outside diameter (3mm inside diameter) plastic balloon stick. more instructions in this youtube video:

https://youtu.be/t1FxCKXK-P4

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