ph / nute lock out? manganese?

Been vegging around 5.8ph, doin low pressure aeroponics/nft. I think at 5.8 manganese might be locked out... check out pix of my leaves and please confirm/advise.




im concerned about the chlorosis/yellowing between and the necrotic/red spots on some of the leaves. Veins still appear green, its really mostly affecting the leaf tissue between the veins. Also is it just me or are sativa plants more sensitive to this?

im a soil grower so im not sure but liiks to me like nuts. burn.

What is your ppm on the nutes you are running? Looks like you pushed it a little too high to my eye.

Hi FIM,
Just a few pointers on pix. Under led...they are essentially worthless. and when you have a leaf issue...show a close-up of an affected leaf.

I see some leaf tips that are necrosed and curling up. That's usually from nute burn. But that doesn't mean that there can't be a deficiency also.

Manganese is a micro-nutrient and I suspect that you mistook MG to mean manganese rather then magnesium. Correctomundo??

I'm not there with the plant but you say you see lightening of leaf except for the veins. That's Mg (magnesium) def.

So combine those two things and come up with a plan. Lighten your overall nutrient load...but add a little Mg. It could be mal-absorption due to nute buildup...but as you lighten the nutes, that should resolve. I use Epsom salts and in your situation...maybe add in 1/2 tsp/gal. That's what I would do...
JD

Thanks for the replies guys, I thought it was maybe manganese based on the descriptions and this ph chart I had been looking at. I didn't realize Mn was a micro nute... thus probably not the issue.

What ph should I be running at, and should I maybe use some of the foxfarms flushing stuff I have? This is the chart I was refrencing, not sure if its any good.
View attachment 2927862
but I knew i had been running at 6.1 for awhile, then i started seeing the yellowing, adn noticed the red spotting on the leaves, and a couple of the older fan leaves curled up on the sativa plants. I saw the gap between mn and mg and figured I must've locked out mn... I have no idea what ph to run at, ahhhh!

I ended up dropping the ph down to 5.5 thinking it was Mn, and have just now gone and put it back to 5.8.

The ppm was high like 1230ppm, for awhile, added water, at 1100ppm now.

6,5 to 5.5.is good

fim,
A nicely set up hydro system will show a gradual rise in ph as nutes are used. Then as you refresh and correct the res, you drop it to desired level. The drift in ph is actually good and if you spend your time trying to pin it to a ingle number...well you'll be a busy guy! lol

So correct to 5.6 or so and let it drift up to 6.2 or so....then repeat.
JD

Edit: Mike and I were posting at the same time. His suggestion of 5.5 to 6.5 is totally workable...I was just being conservative.

Thanks again