Hydro Help

I have a clone about 2 1/2 weeks old 10 inches tall in a water farm drip system with 10watt coralife 50/50 10000k bulb 7 inches Away from plant and using distilled water an flora sireas and rapid start my ph is around 5.3-6.0 don't know my ppm my problem is that I have brown tips growing, bottom leaves wilted and mid leave curling upwards with brown on all tips did have a temp and ph problem but fixed it roots died on one side but growing strong on other

probably nute burn, but whats your air and rez temps? how do the roots look?

Temp is 70s Fresh air comes in 5 Times a day

Some roots died on one side other side roots are growing strong