Are you fishing too deep?

[tomfor]

Ice fishing a 50 acre Lake with a 90 ft Max depth. We fished for four or five hours and weren't doing very well. Moved around a lot and drilled 20 holes at various depths. I then thought what the heck I'm going to try it super shallow so I moved in and found six feet of depth and we got nine splake in about 90 minutes. Is this a trout thing? An overall fishing thing? What is your opinion.  14 inches of ice btw

[Spiel]

Nice catch 

When I target Brookies and Splake through the ice I rarely fish in water more than 10 - 12 feet, they like it shallow.
Sometimes I'm in less than 5 FOW.