Hydroponics nutrient solution refiller (for sprout tray)
thingiverse
This part is designed for use in conjunction with "Bottle Connector with funnel by cgongora69" (http://www.thingiverse.com/thing:902607) to maintain a consistent nutrient solution level in the sprout tray at 5-6mm or 12mm height. **UPDATE (6 Sep 2015): I've added a 12mm version, which is recommended for use with sponge as a grow medium.
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