Alfalfa Meal and Coffee Grounds - can only be used in moderation due to their high nitrogen content which would fuck up waterways way more than salt.
Beet Juice - not nearly as effective as salt
Grape Skin - still in testing, no where near close to market, unknown ecological impacts
Brine - has the same problem as salt because that’s essentially what it is
Manual removal - are you fucking kidding me?
Salt is the best we have, and the alternatives aren’t just less economical, they’re also just plain unfeasible.
Oh so you have seen it and fully understand it then. Got it. Thanks for your contribution.