Burn or deficiency? Part 2: The Reckoning

A

Azraelstrom

Member
Hey guys. I posted an official update on the overall grow on the Newbie section, but I have one specific concern I wanted to address here. There's some yellowing happening on the tips of some of the leaves, with one curling upwards as well as yellowing. Is this nute burn? If so, I'm a little weirded out, because her younger sister isn't discolored anywhere whatsoever, and they're only one week apart. Or is this some sort of deficiency?

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rkymtnman

rkymtnman

Well-Known Member
not nute burn. just the tips would be yellow. a deficiency for sure. now to figure out what?

what ppm/EC are you feeding at? if i had to guess, the smaller plant is dialed in but the bigger plant is lacking.
what nutes? what additives?
 
A

Azraelstrom

Member
GH Flora Trio, PPM is currently at exactly 586, down from ~600 the other day. Didn't want to add any more in case it WAS nute burn.

No additives other than Hydroguard to keep root rot at bay. It's also worth mentioning that my pH continuously goes down no matter what I do. If it's 6.1 when I go to bed, it'll be 5.8 or lower when I wake up.

I usually have to pH Up at least once or twice a day.
 
rkymtnman

rkymtnman

Well-Known Member
so your ppm is dropping every day? which is good. it means they are eating.

you should only adjust pH once a day.

you are in DWC right? i had great success with Lucas formula in DWC. try this for the next time you mix up nutes: use 8mL micro/16mL of bloom per gallon. no grow at all. i used RO water and Lucas and never needed cal/mag.

the goal you want to hit is this: your water level drops but your ppm stays the same. that means they are drinking and eating at the correct amount. if your water drops and your ppm drops, the nutes are too weak. if the water drops and ppm goes up, the nutes are too strong. make sense?
 
A

Azraelstrom

Member
Yeah. The PPM doesn't drop dramatically every day, but the pH does.

I know I'm not supposed to adjust pH frequently, but I have no choice. One morning I woke up and it was 5.4. Had I waited any longer, it would have dropped to a really dangerous acidity.
 
rkymtnman

rkymtnman

Well-Known Member
your pH should be rising daily,not dropping.

my guess is there is still some root rot going on which will lower your pH
are you close to a hydro shop? try dutchmaster zone if you can get it. use the max dose and see if it clears up. i never had success with hydroguard..
 
A

Azraelstrom

Member
Roots actually look good. Much better than they did last time I posted. There's no icky brown color at all anymore. I talked to the hydro shop owner, showed him everything, and he thinks it's a deficiency. Suggested I up the PPM to ~700 and see if that helps anything, including the pH fluctuations.

She is drinking an awful lot of water, so I'm wondering if that combined with the temperature fluctuations(the res cools down for six hours a day during the dark period; the air being brought in is also cooler at this time) is contributing to the issue.
 
rkymtnman

rkymtnman

Well-Known Member
maybe? in dwc for me, if water level and ppm's were dropping, pH always drifted up.
keep us posted.
 
A

Azraelstrom

Member
Yeah, I'm not entirely sure. He said I didn't need Cal/Mag and should just stick with my usual nutes. If he was trying to burn me for cash he would have had me buy a bunch of stuff I didn't need, so I more or less trust the guy. We'll see how things look tomorrow.
 
Alexander Supertramp

Alexander Supertramp

Well-Known Member
Most pH up contain lots of sodium. Upping your pH twice a day may be introducing too much sodium in to your res. And too much sodium can lead to all sorts of headaches.
 
A

Azraelstrom

Member
zeddd said:
the discolouration u see on the leaves is splash burn from dripping nutes on young leaves while watering, don't stress but to really fine tune those babies your pH looks a point too acidic, peace z
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It's a hydro setup. There's no way it's from splashing, since I don't put nutes anywhere near the leaves. The pH likely is too acidic, though, since it's continuously dropping.

Alexander Supertramp said:
Most pH up contain lots of sodium. Upping your pH twice a day may be introducing too much sodium in to your res. And too much sodium can lead to all sorts of headaches.
Click to expand...
I'm not sure how else to keep the pH up. If I leave it unattended, it'll hit below 5.5 within a day.
 
unwine99

unwine99

Well-Known Member
What is the ppm of your tap water? Some people have success using tap and others have nothing but problems, I had nothing but problems. An easy fix would be to use filtered 0 ppm water, 250 ppm's calmag, and equal parts GMB until you reach 600-700 ppm. You can go from start to finish using 6-750 ppm this way without any deficiencies or toxicities -- easy as pie.
 
unwine99

unwine99

Well-Known Member
Then you might consider buying some calmag like Bugeye suggested, bring your base ppm up to 2-250 with calmag, then add your GMB -- definitely looks like a calcium deficiency.
 
OG Gardenz

OG Gardenz

Active Member
the improper ph of a solution can directly lead to deficiencies... at certain ph levels some nutrients become unavailable... your nutes might be ok, may just need to fix your ph problem...?
 
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