I myself don't like using any chemicals , cayno shows it's face in low flow areas more flow along with large water-changes with RO
would have yielded better results IMO
it may take a few more days to achieve but you wouldn't have that nasty smell. as you would be replacing more of the water ,
now for the smell I'm guessing rotten egg simple fix remove the tanks top point one power head towards the surface so the water ripples air/gas exchange should resolve that in a day or so . in other words the tank needs to breath ,
as for water being murky add carbon you still have residue from the chemical you used.
Quick fixes always lead to other problems as your finding out , #1 rule of saltwater take your time and don't rush it , natural over chemical also yields results to be proud of.
remember chemicals = rushing nothing good ever comes from it . #2 rule Never Never listen to the clerk in a pet shop , they will sell you anything for a fast sale and 90% of the time they know very little to nothing about the product their pushing on you , they may tell you it's like liquid gold don't fall for it .
the only liquid gold I know of is RO
hope you get things straightened out always hate hearing about loss of livestock and coral as I know it's not cheap , in the past year I have noticed most of those online saltwater vendors that used to cater to the low budget are going a new direction they have become way too proud of the coral and livestock they sell, hard part is it's the same quality if not worse .