What Is This? Pic

Just started noticing this with my recirculating top feed drip with six plants in hydroton and a 15 gallon reservoir. It started out as the yellow blotching on the leaves, not defined, just green fading to yellow here and there. Only on a few close to the center of the plant. Upon closer inspection there are tiny, tiny brown dead spots that are at the center of a yellow blotch. They seem to be spreading and are now on several plants causing when grouped together what looks like a phos deficiency (I do have purple stems). The only spots caused by a deficiency I could find that looked like it are manganese.

At first I thought they were just splashed with res water, but the spots are so tiny. I looked all over it and can't find any signs of infestation. I've been having problems with my ph rising from 5.5 to 6.2 in a few hours recently and I've been putting in ph down. Could this be from ph burn?

I've also been using a lot of organics, sugars and stuff, thought maybe all the potash caused a manganese lockout? Potassium toxicity?

I also recently transplanted and heard that this could be necrotic growth. There are also some flecks on some of the leaves of another plant that look A LOT like heat stress or cal deficiency, but where there seems to be more I read it could be due to transplant.

All help is greatly appreciated.

why you putting in ph down... run it 5.8 to 6.8...

Whats your ppm? If you don't adjust the ph will it stay at 6.2 or does it keep rising?

my ppm's had risen from 700 to 800 after introducing the cultures. Dustin, I would agree with you, but running it 5.8-6.8, at this point it has that change in the coarse of a day. SIMPLY CHANGING THE PH THAT MUCH ONCE A DAY is giving me ph spotting which is what I think is in those pictures.

I recently flushed and changed out the water to straight up micro grow and bloom with calmag. Only had it on for 20 min before nighttime but THE PH SEEMED TO STABILIZE. It was no longer a steady stream of .1 over out of the drainage.

What could I have been adding that caused it to do that? The hygrozyme? That or maybe the cultures.

I tested the hygrozyme in conjunction with my floralicious and compost tea alone. It did seem to raise their ph a little after first dropping it.

Also, my roots are like black, not brown(only a little of that, not like when I once had full on root rot). This dark color is normal right? Result of the floralicous which turned my res water dark?

hygrozyme will raise the ph about .1 - .2 for every 10ml per gal of water but i've never seen hygro do something like that so i really don't think thats what it is... and the roots are black? my plants - which are well over 4 and 5 feet tall have white roots. They're the healthiest looking plants i've ever had and perkier than any i've seen on this. Not topped at all though, just supercropped. how much water are you using and how many ml of each nute?

Well it seems to have stablilized! I changed the water and just used micro, grow, bloom, calmag, superthrive that good acid to help it digest, wet betty, and . . . hygrozyme (the last of which should clear up any dead material on the roots, like peroxide, but will allow the bacteria and fungi to stay alive).

What I have not added: floralicious, tea compost, supervit, nectarsweet (basically my organics), and dm ZONE - potassium silicate.

HOWEVER, I did tests in kitchen glasses with all the not added ones on the bottom (except zone) mixed with the hygrozyme then later cultures of bacteria and fungi. The ph first dropped, then climed about half a point. It was NOT as vigorous a ph change as what I saw in my rezzy.

SO WHAT IS HAVING THE INTERACTION? The hygrozyme and silica? The only two I haven't tested? This is weird!!!!


I think the black roots were from the floralicous or the cultures.