That’s good viz? I guess I’m spoiled as all but 2 of my 95 dives so far have been in the Caribbean. I’m also surprised that the wrecks seem devoid of any fish life? I’m not criticizing as anytime/place you are diving it is a good thing - just observations as I’ve never seen Great Lakes diving footage.
The Tacoma had crappy viz, like what I’m used at the quarry. We had 40-50ft viz on the other wrecks. That is excellent.
Some wrecks have fish, I’m told. I’ve not seen anything more than gobies or other small ones. Lack of marine life (other than the mussels) doesn’t bother me. I’m there for the wrecks. If you want abundant marine life, well, that’s what warm water is for.