Just a follow up. Everything is fine.
Had a half dollar size area bleach on my pink milli, and about a quarter size bleach on my other pink tabling acropora. This is only about 5% of the total size of either.
I did one 40 gallon w.c. and ran a two little fishy full of rox 0.8 carbon for about a week. I had it and was panicky when I wrote this initially. Did it help? No clue, but did not hurt. That was also my only water change in months.
My Chaetomorpha did very well though. I tossed a 5 gallon bucket full today. First thinning out since the iodine overdose. This is more than usual but I don’t weigh it or anything. Just toss every couple of week about half that.
So lesson learned is pay attention to decimals!
Thanks for all the replies!