Tag - what fish for algae in an aquarium

Many anglers use fish finders as an invaluable tool to help find and catch more fish, but they can also take up valuable space on deck. If you’re going out on your boat primarily to go fishing, is it worth having the space taken up by a fish finder? Does it really make a big difference to have one on your boat? What are some of the pros and cons of having one on your boat?