My fish does not have and black horizontal stripe that goes from nose to the fork of the tail like on Siamese Algae Eater. That is why I think that my fish is a "False siamensis" (Epalzeorhynchus sp. or Garra taeniata).
I think Garra cambodgiensis and Garra taeniata are synonyms.
But I don´t know if it is what you call "Red Tailed Garra".