09-04-2011, 09:08 AM
I would think it's not the temp of the whole pond that you want to check. It's the freshwater coming in from underground that is geothermally heated.
Go feel the water right when it enters the pond. If the heat of that water gets substantially and abnormally hotter, then it seems reasonable to wonder whether magma movement may have increased the geothermal effect.
Go feel the water right when it enters the pond. If the heat of that water gets substantially and abnormally hotter, then it seems reasonable to wonder whether magma movement may have increased the geothermal effect.