can't figure this one out ?

Ph is 8.0, good soil mix, weekly feeding with micros, plants look bad !

Sounds like you are organic. Are you giving water that is clear of chlorine, etc? Bring your ph down to 6.5 using a organic product like Earth Juice, it will not kill micro's. What else are you feeding them?

your ph should be 6.5 to 7.0.

nothing we grow is at 8 for ph...weekly feeds...not enough
need to know what soil, or soiless what ec/ppm

soil is from 6.2 to 6.6 ish. soiless is from 5.8 to 6.3. hydro down to 5.5

ph to high