Thanks for the input fellas. I am probably looking for more of an answer than I will ever find. I know there is enough O2 there for survival because they are surviving. Just wonder if they can survive on less than we currently think. I just am having a hard time understanding how we are measuring .8PPM in different locations around the lake and yet somewhere there is this refuge with >5.0PPM.
Jpsdad - Trout in our lake have always outperformed any lake around us. The same fish truck would drop fish in the lower lake then drive on up to drop fish in our lake. By September our fish would have substantially outgrown the lower fish, from the same batch, every single year. We just couldn't ever get them through the winters.
