You have "base" rock again.
As is, the rock in your tank will likely start a massive cycle due to the covering of dead organisms, crustaceans, etc. All that organic material will disintegrate and your ammonia and nitrite will spike BIG time. Scats are "hardy", but they also need very clean water and overfiltration. It doesn't look like your filtration is adequate.
I am no saltie, (you and be both petluvr LOL) but it may take months to cycle that rock. Get more feedback from the salties here re: what to about the LR (plastic bin "cooking"???), but I would pull it all out of that tank ASAP. These are great looking fish, and you've put them at significant risk of ammonia poisoning.
You've already heard a few comments re: tank size for these scats in this very thread.... those scats need a larger home. That 140 could be really good for them though.