I just freed my Molly from being stuck between the interior filter and the aquarium glass for unknown time (minutes to 12 hours):
The image shows that the fin is overstreched and after 30 min of being freed he doesn't still use it. He can direct his swimming when chasing females and stand "upright". The skin shows some irregularities, probably scales missing put out of place by the shrimp, but no open wounds.
What are recommended forms of treatment (I know there's probably not a "best" solution)?
The filter is a JBL CristalProfi i60 greenline and this story makes it questionable for the use in an aquarium with Mollies as main inhabitants.