Some further information on these great fish.
The October 05 issue of Practical Fishkeeping carried a four page article about these fish and their natural environment, which agrees with the information given above.
In my experience you see more of them if they have plenty of hiding places. Mine is often out at all times of day and only hides (very quickly) if sudden movements are made near the tank.
They definitely prefer real rocks to fake and wood. They also like to dig, so make sure any rock structures are secure. The PFK article says that they live under flat rocks in shallow streams. This explains their digging. Mine prefers to live beneath the rocks it has dug under, rather than the large fake-log which it used before I added the real rocks.
It doesn't eat plants but disturbs roots by digging. This could be avoided by not planting directly around rocks.
Mine has been a very hardy fish and has remained in good health despite me interfering with the aquascape/plants/etc and treating other occupants for a fungus infection.
The PFK article says:"Firstly, they don't like it hot. Temperatures over 25.5C/78F can cause trouble if the water is not well oxygenated; much warmer than that and your fish will die."
However, during the summer months my tank struggles to stay below 28-30C and my rubbernose has survived with no obvious signs of distress. Obviously this is best avoided though.
If you are looking for an algea cleaner then the rubbernose doesn't work miracles. It eats it, but not super fast or in vast quantities.
Edited by Lateral Line, 02 November 2006 - 03:13 PM.