Fish-Hawk.Net

Hi.
My Garmin echomap ultra 126sv comes with preloaded maps (Bluechart and LakeVü). I mainly fish in the Ottawa River and smaller lakes near Ottawa. The preloaded maps shows the detail contours properly, but depth shading (coloring a range of depths) does not work. I have updated the software but it didn't help. I did notice the feature works for the bigger water bodies like the St-Lawrence River (and Big Rideau?).
Does anyone know which map I need to get depth shading working?

Back in the day the Navionics charts showed shaded depth for smaller bodies of water, but now they are owned by Garmin as well so I'm not sure that's still the case.

Go into map options and there's an option for shallow shading that you can adjust up to 33ft.

I checked again on my unit. There are actually many lakes (and the St-Lawrence River) that supports depth shading. Even for the Ottawa River, depth shading is supported downstream of Hawkesbury (but not upstream!). Unfortunately for me it doesn't work for my fishing section of the river. It's strange that it does show the detail contours (1' intervals) for the whole river.