Dwc brown spots on fan leaves

[Derr1984]

Hello all im doing a dwc 4 plants one plant im concerned about is growing steady but developing brown spots on the lower leaves and slowly drying out ill post some pics any ideas whats causing it? Im using sensi grow a+b, sub culture m+b, bio root, rhino skin, b52, cal mag cause ro water added 5 days ago cause i was thinking cal or mag deficiency but im new to this so any advice?

 

[WeedFreak78]

Is it the Sensi PH perfect or the reg formula? I was starting to get the same thing with the Connoisseur PH perfect, it' was the first nute feeding on 2 week old plants, but it seems to have cleared up..I believe mine was heat related..once i picked the light up a little it stopped and the leaf curling went away. My ph won't go below 7.0 after nutes so I might be getting some lockout..but IDK.. this PH perfect is supposed to make shit available from 5-8 ph..I'm keeping my fingers crossed.

 

[Derr1984]

Is it the Sensi PH perfect or the reg formula? I was starting to get the same thing with the Connoisseur PH perfect, it' was the first nute feeding on 2 week old plants, but it seems to have cleared up..I believe mine was heat related..once i picked the light up a little it stopped and the leaf curling went away. My ph won't go below 7.0 after nutes so I might be getting some lockout..but IDK.. this PH perfect is supposed to make shit available from 5-8 ph..I'm keeping my fingers crossed.

Yeah its the ph perfect sensi and for me the ph will level out at 5.8-63 with all the nutes but i add rhino skin that puts the ph at 8 so i add that to the RO first then ph correct it with ph down before i add anything else... Yours wont even drop with ph down?? I added cal mag thinking its
a calcium or mag deficiency it hasnt gotten any worse and they are still growing up a storm... Its just the one plant with this issue too and that plant happened to be a freebie.. My heats between 70-80 theres a slight swing and its gradual thru the day

 

[WeedFreak78]

I had my lights right on top of them and it was pushing high 80's at one point an 30% rh. I'm low 70's and 40% now and they are doing great. It's also only just one out of 4, and it was a freebie..Dinafem white cheese auto...

As crazy at it sounds, I won't ph down it.. I'm letting it ride..as they get bigger they seem to be good at the PH they're running( 7.0 +/- .2) . This stuff is supposed to be so chelated that it's available in a wide PH range. I've been reading alot about it and it seems to me, just from reading forums so take it for what it's worth, the people who use PH adjusters and cal/mag with the PH perfect line have problems and RO seems to be not quite as good as 100-150ppm water, but I also read they fixed the cal/mag issues in the new formulas..so IDK about that. I use 200ppm@500 / .4 ec tap water. . I only run B-52 as an additive. Supposedly you can run the additives, even though they are not "PH perfect" and still don't have to adjust anything.. You might want to consider doing a res change and just running the base nutes the way the bottle says..IDK what else to tell ya, there isn't much info out there on this stuff.

I'm not a fan/nor a detractor of AN, this is my first time using them, I was offered these from a friend to try at no cost. AN will not talk about PH readings or PPM levels, I called them. When I called, they told me to mix according to the bottle/ online calc., don't check PH/PPM, keep res 68 or lower, change nutes every 7 days. .I'm tracking PH/PPM's and that's it..tracking them. I guess we'll see. Supposedly the way the nutes are made you can't get an accurate reading, because of the way it buffers itself.

 

[Derr1984]

I had my lights right on top of them and it was pushing high 80's at one point an 30% rh. I'm low 70's and 40% now and they are doing great. It's also only just one out of 4, and it was a freebie..Dinafem white cheese auto...

As crazy at it sounds, I won't ph down it.. I'm letting it ride..as they get bigger they seem to be good at the PH they're running( 7.0 +/- .2) . This stuff is supposed to be so chelated that it's available in a wide PH range. I've been reading alot about it and it seems to me, just from reading forums so take it for what it's worth, the people who use PH adjusters and cal/mag with the PH perfect line have problems and RO seems to be not quite as good as 100-150ppm water, but I also read they fixed the cal/mag issues in the new formulas..so IDK about that. I use 200ppm@500 / .4 ec tap water. . I only run B-52 as an additive. Supposedly you can run the additives, even though they are not "PH perfect" and still don't have to adjust anything.. You might want to consider doing a res change and just running the base nutes the way the bottle says..IDK what else to tell ya, there isn't much info out there on this stuff.

I'm not a fan/nor a detractor of AN, this is my first time using them, I was offered these from a friend to try at no cost. AN will not talk about PH readings or PPM levels, I called them. When I called, they told me to mix according to the bottle/ online calc., don't check PH/PPM, keep res 68 or lower, change nutes every 7 days. .I'm tracking PH/PPM's and that's it..tracking them. I guess we'll see. Supposedly the way the nutes are made you can't get an accurate reading, because of the way it buffers itself.

I phoned AN too that was pretty useless as you said too they wouldnt talk about much i have to use the ph down cause the rhino skin jumps it huge from 6 to 8+ so i put 1.5 ml of ph down puts it to 5.7-6.3 and my friend actually said that about the RO he uses filtered mineral water and never has cal or mag issues but before with RO he said he had issues... And i just did the change last night im flushing before flower i added a few base things like the subcultures im gonna flower them next week

 

[Redvirgo]

I had the exact same issue on 1 plant and only on the bottom fan leaves on the first node. I am using the gh trio and following a feeding chart by ph imbalance. I noticed that when adding my nute mix to my rez through one of the top empty net pots from a 5 gallon water jug I splashed a very tiny bit on top of the rez and cleaned it up when finished thinking nothing else about it. It was my first rez change at 10 days. Following the initial begining filling and nute mix I mixed everything the same and emptied and refilled my rez. The next morning almost 24 hours later I checked my babies and damn, both look really good 3rd node complete and the 4th node showing leaves. The baby that was closest to where I filled the day before had a few spots that were brown and rusty looking just like yours. I am thinking that the nute mix must have splashed on her. I let it go for 4 days to see if it would clear up and it only seemed that it was spreading up the leaf that it was on. I have 2 pants, both germinated very fast and had a 12in root coming out of the bottom of the rapid rooter inside a mini greenhouse after 7 days from germination. Both same strain and both in the same rez. One had that brown rusty looking shit on it and the one on the other side of the rez looked exactly the same just without the spots. Hope that might just be the problem with yours? Solution was to remove the 2 affected leaves last night. Girls looking great this morning.

 

[HaveYouSeenApril]

looks like nutrient burns to me.