I know Rachel O'leary has them in her 'hillstream' tank, but I have no clue why because they are not tropical/subtropical, and don't come from flowing streams at all. They are said to require cold winters if they are to live beyond a couple of years of age. Is that correct?
Do they burrow? I've yet to see them do that.
The only Cobitidae I have experience with is Acantocobitis, which is far different.
Cobitis are found in the tropics, but also in Europe, in fact 1 species is found here in NL waters. But it is unlawfull keeping this species here, they are protected.
As far as I know, all Cobitidae comoe from clean water, and I thought all from streaming water. If they are a northern species, you will have to provide them with cold water, which is not easy.
4-5 C in winter, and in summer max 20 - 25 C. And lots of water changes
Some temperate fish need cold winters, for others it makes no difference, I don't know about Cobitis loaches.
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