Hydroponics nutrient solution refiller

SummaryThis part is for used together with "Bottle Connector with funnel by cgongora69" (http://www.thingiverse.com/thing:902607) to maintain nutrient solution level in sprout tray at 5-6mm or 12mm height. ** UPDATE (6 Sep 2015) : I've added the 12mm version. Recommed to print this version if you use sponge as grow medium.InstructionsPrint with this setting. 0.2mm, 15% infill 2 shells. Fill 500ml bottle with nutrient solution. Put the Bottle Connector cap to the bottle and place it b