calcium magnesium problem??

yellowing of leaves, stunted growth, brown spots inbetween veins of leaves, the leaves are also canoeing inward. any ideas?? they are in week 4 of flowering. temps are good and ph is good, i am using the lucas formula in an ebb and gro system. i bought some calmag to see if that is the problem, i am using ro water also

Mine were in 4th weeks with similar issues. I thought it was calmag at first but flushed them first to be certain it wasn't nute burn. Glad I flushed cos now they're doing fine and back on their FF schedule. But I was prepared to treat the calmag def. if that's what it was - turned out not to be.

what did you flush with jsut clean ph balanced ro water?

some of the other plants are starting to show this too, the worst of the bunch is the last pot that gets watered, the plant overall is very light green in color, any help or suggestions would be awesome.

i think it is due to underwatering after som investigation it seems to be spreading to other plants starting at the last pot that gets watered, i am using a cap ebb and gro and i think the roots are slowing the water flow therefore i need to water longer did a flush and it only raised the ppms 150 ppm so that is not over fertilization. will post results in a few days

well i havent solved my problems bud formation has slowed and leaves on all the plants are showing effects running at 1300 ppm at 5.7 ph leaves are turning yellow, some showing spotts on leaves others just turning yellow, plants are light green in color and have stopped producing, any ideas out there some help would be awesome!