Andrew,
these Olidus were in a f/glass pond but the pond was raised above
ground (had not got around to digging a hole), therefore the water mass
would have not been able to sustain an real temperature. The water temp
probably got lower than that at times. I think that most of the galaxids
would suit lower temps, they seem to be more vulnerable at higher temps. The
best thing to do would be to try and collect some fish in relatively shallow
streams at some altitude. This would ensure that they were reasonably
climatised to cooler temperatures. The Galaxid family is good for ponds as
they quite often swim in the top water layer making them occassionally
visible, unlike Melat. species. You had better watch out for kookaburras
though as they gratefully accept those fish which are kept in confined spaces.
Andrew (Da-jar-voo????)