5 x Afghan Skunk Fast - 400W HPS

Weed has awellness temperature and that is above 20 degree and under 29 degree everything under that slows down, and above stresses her but your numbers are good, alittle warmer in the daytime would be good, but it is enough your nighttime temps are toatally okk

7 dayys is along time, and awelccome invitiation for pests do it as you mentioned and try smaller amounts between 0.3 and 0.5 l each plant check them daily,,,,, if the soil is knuckledeep dry.. water again... feeding: never feed in dry soil....... so just water tthem with the half of pure water,,, then go with your feedding mix

Browsed through your diary...my conclusion is hydric stress, meaning in this case your substrate does not drain well (no perlite like you said). What you could do is to carefully drill holes on the side walls. Try on 2 of them first, the worst looking ones. Rise a little the temp if possible to increase perspiration . Do you have a working fan in there ? Stop watering until substrate is visibly dry or the roots will rot and plants will dry. Next time You´ll know and put drainage on the must list :-) ! The other thing You could do is add 10 medium sized earthworms per pot( considering its volume), they will increase to some extent the drainage, wich is better then nothing. If no visible changes in a week, add another 10. Hope this helps. Spirit Up !

and no need for using Bloom atm,, forget the charts, sttick to your vegetation Nutes ( and only the vegetation + Beneficals) otherwise it adds up to much nitrogen. and they have no need for P and K atm