Some yellowing using MegaCrop in soil.

[HemiSync]

I could tell you were dealing with a salt build up just looking at the outside of the pots. Did you rinse then off well also?

Yea I noticed that as well, when I got them but I know she reuses her fabric pots, so thought it might have been from that. This was her first attempt at a photo strain and she had the whole light schedule backwards. Yes I did rinse them off.

I would have added the bennies after the flush today but I just ran out of time and had to get to work. When the lights come on at 7 the bennies will be added. Thanks again.

 

[Dobbie Dude]

I have had same issue last 4 grows using MC , growing autos so not an issue really but I made up a spray bottle with Calmag(2 mil) and Epsoms salts(3-5 grams or a pinch or 2 ) and spray away- I do this 1-2 times a week(depends how much I;ve been on the billy)..
New bag of MC V1 just started using and pushing the plants to 750ppm-850ppm (nothing else) and they are looking very good - I use to run 550 ppm with SC & BE and was having a few issues

 

[HemiSync]

I have had same issue last 4 grows using MC , growing autos so not an issue really but I made up a spray bottle with Calmag(2 mil) and Epsoms salts(3-5 grams or a pinch or 2 ) and spray away- I do this 1-2 times a week(depends how much I;ve been on the billy)..
New bag of MC V1 just started using and pushing the plants to 750ppm-850ppm (nothing else) and they are looking very good - I use to run 550 ppm with SC & BE and was having a few issues

Thanks, I think we have it sorted. I was over feeding trying to compensate for reused soil, a change in nutrients, and having been reversed from flower stage back to veg. I flushed them good and then reloaded with 550ppm 6.5 ph nutes and then some recharge bennies afterwards and they are perking up. Will know better after they dry out for a day or two.

 

[Waira]

.... Good job Hemi', steering them out of that skid! you have been chasing the problem around, and now MoG has offered whatI would have, a flush and reboot. the MgSo4, the feeds K especially (look at how heavy GLN is on K, SC is LOADED, so is BE, MC plenty as is), all started locking out micronutes, likelt Zn from the looks of it,...
You can also do a foliar feed with a good micronute supp', like Earth Juice Microblast... Maximun ass-kick with optic Foliar's Transport + EJM .... (Transport is a carrier product that can temporarily penetrate the leaf cuticle, dragging whatever is dissolved in it directly into the factory!)
otherwise, you'll need a wetting agent (Coco Wet is my fav) to help the solution to coat and stick; spray underside of leaves especially, more stomata there...
This will bypass any sideways shit with the soil -