my coral was already acting weird. He always bended downwards and never stayed up right.
Now it fell and broke a bit. Should I be concerned about my health because of the toxic it can release and other coral and animals in the aquarium?
sorry for the bad pics.
Tank seems established, the leather will be fine - as mentioned by @vetteguy53081 it'll re-attach itself to rock - glue won't work, as it'll slime the glue off, just try to stick it in some rockwork, or on a rock you want it on in a low flow area.
If you're concerned about toxins, filter over activated carbon just in case - although I'm pretty sure you're fine either way - no worries