spots on my plants????first time post,Advice please

Hey all you fellow growers of the world,i been growing a few years now but dont have a clue whats up with my plants,over the past couple of weeks in my veg room, a few of my plants have started to droop and fan leaves have developed spots,ive had a good look on the net and in the fourms and havent come to any conclusion on what the problem could be. Im growing in 10ltr pots useing coco and feeding coco A anb B and also Canna Rhizotonic as a root stimulant,i have a 600w and 400w also 250 envirolite 6inch turbo fan tems r 77/48 humidity, and lights r on 18/6,thanks for reading any advice would b great.

.......I 'd think a lock-out of iron or mag(maybe both + cal?)??? What's your pH?? I am not that familiar with your nutes so this is all just a guess, pretty much. I 'd definately think to get your pH in line........are you letting them dry out between waterings??

For houseplants (foliar plants), but I don't see why some of this information cannot be translated to almost any other plant (still searching for flowering plant disease diagnosis).
APSnet Feature - Non-Infectious Diseases of Common Houseplants - Nutritients

RIU link: https://www.rollitup.org/marijuana-plant-problems/38772-guide-diagnosing-plant-problems.html

Diagnosing Plant Problems

Thanks for the reply,my ph is between 6 and 6.5 and ive been watering on a daily basis with about 10/15% run off as i belive coco only holds the water it requires and its virtually impossible to over water,im gonna flush this evening,ive looked on the plant guides but couldnt find any referance to spots.and found you can end up treating the wrong problem if your not careful.

nothing is impossible to over water.... if your medium is not getting dry it is not exchanging that water for air (what happens when your soil drys)....

ill cut the watering down and leave the tops to get slightly crusty,maybe water every other day?its coco im useing tho and not soli,ive just flushed my problem plants in the bath tub,do i need 2 repeat ?as ive never had to flush b4,well not problem plants just at the end of flowering,and should i just b giving them ph balance water after untill the problem has been sorted?thanks

you should always be watering with PH'd water (water with a ph between 6.0 - 7.0) and you need to make sure to check your PH after you add your nutes to your water as well, casue they will make it change.

I have never worked with coco, but the general theory holds true, you cant keep the medium (soil, coco, rockwool w/e) saturated, air will have no way of reaching the roots if the medium is consistently wet...

I dont know if you need to flush again, you do how ever need to know what your mediums PH is, that way you can tell if you need to flush again (and I am assuming you flushed w/ PH'd water right?).

Thanks, i do always check ph in the water after ive added nutes, and ph is always between 6and7 and the water is room temp,ive used canna flush which lowered the ph so added a few drops of ph up 2 bring back to 6.5,i was gonna leave them for a day or so now b4 i water again.its just weird that its about 6 of my plants effected,i just need 2 get it sorted so it dosent effect the rest of my crop,do u think it could b something to do with the amount of nutes ive been feeding them?they have been getting 4mil each of canna a and b per 10ltr?im gonna cut it righ down anyway i think justto see if that was the cause.i wouldnt mind a bit of that 420 in you apt lol,im somking a bit of thi stick at the min,not growen by me but still nice.Thanks

yea just remember, less is more, if you need to isolate your actions and give them time to effect the plant. If your doing all these things at once, and one of them fixes your problems your not gonna know what exactly fix it... ya dig?

I think your on the right track, cut down on the nutes till you figure out whats hurting them. The best way to solve a problem is deductive reasoning, which you are doing, we eliminated the possible watering issue, and water PH so if those two do not remedy the issue, next lets cut back on the nutes... give it a couple days w/ diluted nutes and see the results...

I mean no one can provided you with precise directions on how to fix your plant and make it perfect, we can only provide the most common issues and try to help you fix them.