Ppm in Res is 900
That's a high number in my world... I max out between 700-750 in flower.. In veg, I stay around 500-550.. I can always raise it if ever needed. I like to get a feel for the plants first and start with low dose feedings until they say "give me more"... That's an easy fix... But the plant saying "I've had too much" is a harder problem to fix. I've had to remove plants from the res, flush them, then put them back on the res. That may help, depending on what the actual underlying issue is.