We dive quite often in Banff National Park. We are not supposed to pick up cans, bottles, and stuff like found underwater because it becomes habitat. There is the obvious stuff that will not be habitat, but the general rule is if it's been there more than 24 hours it stays.
This is a good point I did not think of and I appreciate the reminder. It is something to be mindful of when picking up trash in the water.I also was not aware of rules in certain areas where it is not allowed to pick up trash where some creatures can reside in.
Good point.