[helene schoubye]

The middle photo to me looks like paludicola all right. The other two photos are not possible to id.
Paludicola also is a species where it makes sense with the import from Thailand as their natural habitat is in the very north of Malaysia bordering to the South of Thailand. They do look thin and not too good. Please be careful providing good water quality ? and good food. Sounds like you are doing that. Paludicola is very very rarely in Trade.