I followed your directions from the first post and am pleased to say that I seem to finally have won the war on clado. When I upgraded my lights from t5no to led I got a huuuuge clado outbreak that just hasn't been going away. I would seriously pull pounds of clado out of that tank every week or 2. Needless to say my other plants suffered, and my tank looked like crap. Now my tank looks much better, and all traces of the offending clado are gone. Careful maintenance will hopefully keep it away haha.
I did combine this treatment with a very, very large water change and it resulted in a mini cycle for my tank. Nobody died, but I did have white cloudy water for a few weeks until everything balanced out. Now my water is crystal clear and I can enjoy looking at my tank again. Wahoo!