Clown Loaches will be way too big - have a look at zebra loaches or some of the other gorgeous smaller types.
A Bristlenose plec would be fine
Neons are not the hardiest tetra - have a look at some of the other types as there are loads that are both prettier (IMO) and tougher.
A Bristlenose plec would be fine
Neons are not the hardiest tetra - have a look at some of the other types as there are loads that are both prettier (IMO) and tougher.