I am afraid not.Yours?
They come from warm waters.hoping to eventually add them to an unheated basement tank
That was a concern of mine. Their geographic range implies warm water, but many of the online references state that temps down to about 15 - 16C are within their ideal range, with maximum 25C. I hoped and assumed that this was due to the fast flowing waters they inhabit. Of course, many sources also say 25 -28C is required...but they recommend that range for literally everything, so...They come from warm waters.
reference: https://greennews.agency/?p=15669There are at least two other species but both are smaller or much smaller. The one you mention is the old synonym of A. Choirorhynchos which as you suggest are “supposed to be” warmer water fish (25-28) but equally only supposed to reach 8”.
18 - 19C is too low, IMO, down to 15 - 16C, never.That was a concern of mine. Their geographic range implies warm water, but many of the online references state that temps down to about 15 - 16C are within their ideal range, with maximum 25C. I hoped and assumed that this was due to the fast flowing waters they inhabit. Of course, many sources also say 25 -28C is required...but they recommend that range for literally everything, so...
Mine were listed as Acantopsis dialuzona by a retailer/importer who is pretty reliable and conscientious about proper identification; that's the moniker I googled looking for info. Are there other species with perhaps different requirements?
Right now they are being maintained at 18 -19C and are very active and feeding well. I'll keep them in that until they put on some size, and will then slowly lower it and see how they react.
Sadly, between their apparently slow growth and the temperature thing...it looks like I'm a year away from actually putting them into the tank I wanted them for!
Well, that's it then; you have officially harshed my mellow.18 - 19C is too low, IMO, down to 15 - 16C, never.
These are not mountain stream fish, they are lowland. I would say the variation in temperature is more like 25 - 30C.