Water Level Gauge
thingiverse
Water Level Gauge for Hydroponic System. It fits a 3/4 inch hole. The length of the float is 170mm. A piece of Styrofoam, measuring 40mm by 14mm by 14mm, should be pushed into the float's pocket. More Smart Garden Things can be found here -> https://www.thingiverse.com/groups/smart-garden/things
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