You always hear alot about the thermacline and oxygen levels when crappie and other species of fish. Does this also apply with catfishing? In the lake I'm fishing there's plenty of 40-80+ feet of water where I've been fishing but as of yet I havent tried the deeper water, been sticking to 25 feet or less. Reason I'm asking is I thought I'd try a few dropoffs from 30-40 feet of water dropping down to 60-80 foot of water but didnt want to be wasting time if you guys knew better. Gimme your thoughts.