Looking great now. The biggest and bigger loaches look great. With a pack leader that size it makes it easier to see the little guys. One of them was very skinny and flashing a bit, but a little tlc will go a long way.
Very nice loaches mate, some very beautiful specimens in there.
The skinny flashing loach probably has parasites. You may want to de-worm them all. Try getting a hold of FlUbendazole based treatment.