DWC and high altitude

just wondering if anyone can tell me anything about there growing experiences with high altitude. Just moved from 9600ft down to about a mile and I am using a dwc system with just airstones. I read something from al b about using Nutes on lower end of the suggested recomendation that's about all I have heard. Any help and input would be great.

Also my water ppm is about 250 out the tap and let sit overnight should I use a nute for hard water?

Thanks

if u done it at 9600ft with out a prob then u wont have a prob at 5280ft

Kinda messed that up meant to say only did soil up there this is my first hydro attempt and dont wanna mess it up..

Never really changed much at high altitude. I've had grows at close to 10,000 ft.

were u using dwc I just heard the high altitude fucks with the Dissolved oxygen and salt levels..