Water buoy-proof of concept phase

Testing it out in a municipal waste bin filled with water- water goes up and down with the rain and some occasional hose input.  Decided to put the steel pipe aside and go for schedule 80 PVC held with three pieces of rebar at 120 degrees separation each driven well into the creek bed.  I couldn't imagine doing this in anything bigger than very small tributaries with such a design, but that's what we're testing.  Looking to get it out in a few days.  Have a couple of ideas for securing the battery and for providing a bit of ventilation for the hydrogen gas that would emit.