QUOTE(emmahj @ Feb 5 2005, 03:52 AM)
I have neon tetras and my water has a pH of 8.0 - 8.2. They do just fine in that.
I do not know much about other tetras, but I *think* that black neon tetras and rummynose tetras are supposed to be tough.
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Yes, black neons are pretty hardy, and very fun too

I've got a few in my tank which were rescues. They were perfectly fine at the pH 8.4 ( i didn't know it was so high) but I lowered the pH gradually and they seem even happier now. I think most tetras will do okay in a slightly higher pH if its gradual and all the other conditions are good

BTW: the black neon tetras names are Ruby and Rummert