Hi Martin, I agree with Bennie that this are no deissneri. This are Parosphromenus with a round tail fin. Probably a bintan similar type. In question may come P. opallios, rubrimontis, alfredi, tweediei or also a unknown type from the not much known Sumatra or Borneo. A mix can not be exclude and I think it is probable. Even with a good picture, the assignment will be complicated or even impossible.
Christian Hinz (Berlin, Germany)