Okay well my ? Is could a group of five survive well in my tank where the ph is around 7.6
I think so. I would just take a little more time in acclimation to introduce them to the water, I think after the initial time of getting used to the new tank they should be alright.
We had them in Southern California as a kid, and although it isn't as bad as some places in the country, we called the water liquid rock, lol.