i use athena pro too, my plant healthy at 3.0EC with som Additives (sweater, calmag, liqudkarma), In the next few weeks I will try combining athena with A/N Big bud and H&G shotting powder at late bloom
i already run Athena pro line base in veg at 3.0 EC and my plants happy, not burn
now i wonder can i use athena with AN big bud and H&G Shooting powder, i will try to do it soon