Bruce -- if your well water has some iron in it then it sounds like a hemoglobin bath. Throw in the horz. aeration and some food (pellets) and no wonder Dr. Frankenbruce has so much success his lab is a natural womb.

Ski -- I can't believe you did not use the monster tires but there is still time. Drill a few holes in them , pour quickcrete in the side opposite the holes , get a rope with grappling hook , put them all on the Liberty Ferry and motor out right above the big hole. Find the hole edge and one by one lower them to the bottom so they stand up on the hole edge until they circle the entire hole. Just be real sure not to get the rope wrapped around your ankle when you lower the first tire. We would not want Mrs. Boss-ski to get wet when she jumps in to get you un-anchored . That is if the thing does not displace all the water in the pond and ground the Liberty Ferry when you throw it in. ;\)

Dwight -- it is easy for me to make transcendent observations when the singularity space between my ears is empty. Hey -- but at least I am not swimming in a blood or water softener enhanced pond or tangled up in 200' power cord being wrapped up in two anchor ropes with algae, all being anchored by 3 cinder blocks and a satellite dish calling ET via China. You could use Ski's monster tractor tires with quickcrete as anchors. \:D