For those that aerate a pond/lake greater than say 20-30 feet deep, what do your oxygen levels read from the surface to the bottom? My 30 acre lake is void of a thermocline (temps are 83 at surface and 78 at 25 feet), however when I took oxygen levels with a 30 foot cable, at the bottom the oxgen is only 1.5mg/ml. Here is my question, how does a bass know to avoid that deep area if the water temp is the same at surface cause from my limited knowledge I don't think that oxygen level will support fish life. Thanks.