Help diagnosing issues?

[Cannaman]

I’m having with what seems like k problems that I just can’t figure out. I’m running flood and drain hydro in hydroton like I have for the last 6 years. Tap water is 160ppm and 7.2 ph. Im flooding for 4 minutes every 3 hours in either hydroton or perlite. The res Ph is kept between 5.5-6.5 (i even replaced my apera ph60 probe thinking i was having ph issues but wasnt the issue). Running under 400 watts of samsung lm301b leds. It really seems like a k deficiency but can’t seem to straighten it out and it’s starting to drive me crazy. I was running jacks 321 with haifa cal prime instead of regular calnit. I had some gh flora trio still and showed the same issues. I’ve never had this issue in the 6 years running this way and nothing has changed. Im starting to wonder if something has changed in my tap water cuz im doing the same things i always have and cant shake this issue. Any help would be GREATLY APPRECIATED! Thanks alot for looking and have a great Sunday!!

 

[finedakine]

I’m having what seems like k problems that I just can’t figure out. I’m running flood and drain hydro in hydroton like I have for the last 6 years. Tap water is 160ppm and 7.2 ph. Im flooding for 4 minutes every 3 hours. The Ph is kept between 5.5-6.5 (i even replaced my apera ph60 probe thinking i was having ph issues but wasnt the issue. Running under 400 watts of samsung lm301b leds. It really seems like a k deficiency but can’t seem to straighten it out and it’s starting to drive me crazy. I’ve never had this issue in the 6 years running this way and nothing has changed. Any help would be GREATLY APPRECIATED! Thanks alot for looking and have a great Sunday!!

Got pics?

 

[Cannaman]

Got pics?

Are they not showing up after the edit?

 

[Cannaman]

Here's the pics again incase they're still not showing up on the first post.

 

[finedakine]

Have you tried recalibrating your PH meter / pen?

 

[Frimpong]

Have you tried recalibrating your PH meter / pen?

Was going to ask this and also over and underwatering.

 

[Chefdave]

Whats your ec in your res. Is it going down daily staying same or increasing?

 

[Cannaman]

Absolutely, that was my first move, replaces and recalibrated and even matches up with with the drop test I keep around. With them being in hydroton or perlite, flooded 4 min every 4 hours I figured would be damn near impossible to overwater in such an aerated media. Like I said, it's driving me up a wall.

 

[Chefdave]

They need magnesium but looks locked.

 

[Cannaman]

Whats your ec in your res. Is it going down daily staying same or increasing?

Water level drops daily, and stays pretty stable around 1.5 ec and ph stays between 5.5 - 6.5 . I check the ph and ec daily. When I'm back to my garden I'll

 

[Cannaman]

Just put them in ph adjusted tap to flush them for a day, and im gonna reset the res tonight. Thanks for the help ph fam!

 

[Psychobilly]

They need magnesium but looks locked.

I thought about that too; the way the veins are still green but the rest is looking almost burnt, and it's on older leaves

 

[RookieBuds]

That appears to be a potassium deficiency or lockout. The main symptoms; happens on lower/older leaves of the plant, "burn" happens along the serrations and eventually overtakes the leaves.

pH out of tolerance, could simply need more potassium or you're overfeeding it other things that could be locking out the potassium 🤷🏻‍♂️. Another thing that comes to mind; how you're mixing your nutrients could be causing a chemical "bond" by mixing out of proper sequence?

 

[Cannaman]

I've got an ro unit showing up tomorrow. I've been lucky on my tap for years but starting from pure water can't do anything but help me nail down the issue. I'll update as this progresses. Thanks for all the help and have a great day everybody!

 

[Jewels]

impossible to overwater in such an aerated media

Agreed.
8 inches of hydroton can stand in water.
Also not missed irrigation cycles. Dry-outs will creep crisp yellow, from the bottom up.

I don't have any solutions, but I don't think irrigating is the issue. 🐰