That's really low! Make sure your meter is reading right/ calibrated. I like to use a meter then I'll try to confirm the reading w ph paper. But either way it probably is too low. How old is the
promix? If it was reused from a previous grow its good to add some lime to buffer the acidity of the peat- about a cup per bail of dolopril lime. If the soil was new it should b pre buffered but sometimes the bails come wet which activates the lime raising the ph of the bail which causes decomposition of the peat which eventually lowers the ph again (at least that's my understanding, I could b wrong tho) so that's why it's good to re add lime if reusing plus your plants use up the lime(
calmag ) So anyway if used soil top dress w a little lime(1cup per bail I think u said u were in 5's so maybe a couple tblsp per pot roughly) if new soil and the plants don't seem dire let them dry a little more and water them through w a weak base nute solution (1.0ec) and full strength cal mag (200-250ppm) at around ph6.4 run them thru til it comes out right. If u put ur plant in a saucer u can put a shop vac nozzle in the saucer turn it on and starting pissing them thru if u don't have a drain near by. Hope that helps
