The Escar-go has the same ingredient as the organic Sluggo. Iron phosphate. And, there is something that the slugs want to eat. It is an "inactive ingredient" so they don't need to tell us, I guess. But, I will also guess that it may be like chicken feed
OR nutritional yeast . . ?
I think I will put those plastic bottle traps on the floor along the center posts & bench legs in the greenhouse. I've got to put ant bait down there every year because the piz ants make nests down there . . . and then show up in the containers on the bench

. May as well have a couple types of traps. Slugs can kill a tiny seedling overnight.
These critters can't fly - the only way I can see the slugs getting to the flats of plants is climbing those posts/legs. Of course, they can slime up the walls and drop from the ceiling . . .

.
Steve