Nice pick-ups. Those loaches are extremely thin IMO. Hope they come around. I got some that were extremely thin like that and they are now nice and healthy. Only took about a month to fatten them up. The fastest way to fatten them up is Wardley's shrimp pellets. Not a food I'd feed long term but it'll bulk them up quick. You could also soak it in a solution of epsom salts. 1 level tbsp/2cups water. Just in case they have parasites.