CWJ, I'm also in East Central Indiana. I am in the process at this moment of putting closed-loop geothermal in our pond. If you would like to see when done, you're welcome to contact me as such. Within the next week or so (weather permitting) the contractors will be here placing the loops and installing the system in my basement. Like you, I also had lots of concern around the fish etc. and I did a lot of research and checking and my concerns were pretty much unwarranted; everyone that i found with loops experienced no problems whatsoever (testimonials are always good especially from those that had the loops in their ponds for awhile). Our pond is right at an acre+ and we use a 20' windmill for aeration to the bottom up. Works great. Back of subject of the loops, i had more concern around punctures and my contractor in all his time the worse he'd heard of was a boat anchor catching on one but no punctures with hooks, not to say it couldn't/wouldn't be possible. My rule will be 'NO FISHING' in the area of my loops.
Last edited by MarkECIN; 02/28/08 07:26 PM.