looking like the mix is pretty hot/over fert...the serated leaf edges are my first tell, second would be the K def i see scortched edges in the last pic for sure...K is usually the first nute locked out due to salinity, either that or Ca...
he also mentions the plants are a bit behind, reduction in flower size would be indicative of a hot mix/high salinity...judging my the color of the leaves, i would say your ph looks spot on, you got nice leaf shine, leaves look otherwise healthy, but dark and shiney tells me they have enough nutes....and the scorched edges tells me a K def...usually when plants are doing well and they get a def like this, its due to overfert, high salinity, or ph...
as for Mtgrowncanna:
in these younger pics i see a Ca def, mix might be a tiny bit hot, they are young still, i would let them grow out of it if they can, just heavy waterings to leach out bit of nutes when i would water
in both cases ...i would test your run off, see where the salinity of the soil stands...if runoff is anywhere over 3.5EC then you need to flush..a very nice and healthy runoff should be between 2-2.5EC, tolerable up to 3.5 depending strain, over 4EC and good luck, roots will be fried
