Hey QA... what kind of thermometer are you using to measure temps at depth? I have a floater for surface temps but was thinking about getting a sinker, preferably digital, to check subsurface temps.
A walmart cheapy from the pool section (3-4$). Then, I tied a big hex nut to it to make it sink and have a long piece of cord that I can fasten to the dock post. This allows me to check temps at whatever depth I want. I just plop the thermo in and wedge the cord in a gap in the dock post to secure it. I tied a knot in the cord to dictate the 18" depth. Oh, I also tied an empty water bottle to the free end of the cord so when I drop it in the pond, I can retrieve it without swimming to the bottom.
