I bought a 998 hd si last fall and have been pretty impressed with it overall. I'm getting good clarity on images. I drove over some Bill Dance fish attractors and could see them very well... And when I see a school of crappie in the water column they really show up good.... but disappear when the water column meets the lake bottom. I was hoping for some help in screen color and settings to use. I'm in almost clear water right now. They show up perfectly in the water column but I can't make them out after the water meets the lake bottom.