HYDRO New member, how am I doing?

[Stickybeard]

Just joined and would like some input. My first DWC, been doing good so far. Had a pH drop and caught it within a day or so but looks like it gave me issues ( calcium deficiency? ) on week 7 of flower. I've added cal-mag. Let me know.

 

[Toker1]

I don’t see a deficiency from the photos. Only a bit of nutrient burn on the leaf tips.
Are you using plain tap water? If so, cal-mag might be unnecessary.

 

[Stickybeard]

I'll have to get a better picture.

 

[Toker1]

What have the water temps and PH been at recently?

 

[Stickybeard]

Water about 60, lights on 68- 73, lights off 55. And pH normally sits at the 6.0 +/-.

 

[Toker1]

With hydro you want ph to fluctuate.
In DWC I adjust to 5.5 then let it swing back up to 6.5 before I adjust it back down again. If PH is consistently at 6.0 you are potentially locking out some nutrients that get absorbed at 5.5 or at 6.5.

 

[Stickybeard]

I mix nutrients and pH to the 6.5 (or just under I don't have a pH meter just drops) and at refills pH to just below the 6 range and monitor till next switch. I had the one pH drop to 5 out of nowhere. Thankfully it was a water change day. Flushed with ph'ed water then back to fresh mix just below the 6.5. Days later I saw the spots. I'll take better pictures soon.

 

[Stickybeard]

[No message]

 

[Stickybeard]

I will be inspecting deep tomorrow after finding this. So far this looks to be the only part affected.

 

[Toker1]

That looks like bud rot. From too high humidity.

 

[Stickybeard]

It in fact was from too high humidity. I lost a fan abut 2 weeks ago and it took a week before I could get a new one back in there. And humidity spiked hard. Did what I could. Hopefully I won't find more.

 

[Stickybeard]

But back to the leaf spots. It is on a different limb from the rot I just found. Picture above the bud rot pics. I ruled it as calcium deficiency, was I wrong? It's only on a few of the biggest water leaves about half way to the top of the plant.

 

[Toker1]

Remove the brown. Otherwise it can cause issues.

 

[Toker1]

Can’t say for sure. Seems that way, but the deficiency was from PH lock out. Just my guess.

 

[Mr.furley]

I second the PH lock out. 6.5 all the time is high for hydro.

 

[Stickybeard]

Oh it's well fed water.

 

[Stickybeard]

Thank you guys (or gals) for the input. I'll flush and remix in the 6 ish range.
I cut about an inch below the rot and it's nice and green there.
I think I have only a week or two before harvest so fingers crossed.

 

[Toker1]

Well water and tap water tends to have lots of calcium already in it. I never have had to use cal mag before. I use tap water.

 

[Stickybeard]

Update:
no more signs of bud rot (hell yeah)
got some minor foxtailing ( fist style growing) could be normal for this girl was told she is northern lights when I got her. But this continuing new growth is mostly on the top colas.
Trichomes are mainly cloudy and seeing some amber at the 70% dark hair point.
as of now I'm planing on flushing in a few days for the harvest.
Input is appreciated.

 

[Mr.furley]

Looking really good Stickybeard you are definitely good to start flushing and depending on how you like your buzz can harvest within the next two weeks.
Foxtailing is not a bad thing unless it grows a larger one, Iv always looked at it as "bud swelling" and a bigger yield.