Can Danios And Barbs Live In Hard Water?

They are quite tolerant, but it might be help[ful if you told us the kH and gH hardness so we can comment, because alkaline pH does not always mean hard water. ;)

My first fish were a group of Pearl Danios in spring 2010, which bred and I managed to raise ~9 youngsters, in pH 8; kH 11; gH 13/14 (fairly hard) water.
 
I knew nothing of pH and hardness when I started, but kept barbs and danios without any apparent problems. The water where I was back then, (Richmond, Surrey, England mid 1960's), was hard and alkali, I don't have figures, but from the scale in the kettle, it was obviously bad. Of course, it is not ideal, but the likelyhood is that the shop you get them from, if relatively nearby, already has them in whatever you've got.
 

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