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Non-Stop Deficiency Battle (PICS)

i flood and drain in rapid rooters/hydroton/1gal buckets. 400w A/C on 24/7, flood every 6 hours, 5.9PH 850ppm, RH 35-60% 72-78 degrees. nirvana ak48 are the bigger plants, sensi Northern Lights are the smaller ones

i made a lot of beginner mistakes when the plants were younger that stunted growth but they’re almost 2 months old (AK are about 2 weeks older than NL, NL went in the tray last week) and growth is still very slow and i been battling non-stop deficiency issues (thought i was calcium or nitrogen) I’ve tried using maxigro in different strengths with and without calmag and with and without r.o water and now I’m trying 5 parts flora micro with 4 parts flora bloom with 1/2 gram/gal epsom, making a perfect 3-1-2 ratio with r.o (121-40-81 with 122 calcium and 27 magnesium to be exact plus and extra like 13ppm from epsom) i know the NL and AK should be in separate trays but i don’t have that option right now

the problem is the fan leafs keep dying from the bottom and they’re showing spotting. the only fan leaves left on the AKs are the fan leaves at the top 3 nodes, I’ve also noticed the lower fan leaves are all really dry, especially on the northern lights the leaves are curling and crumbly with brown spots and I’ve also noticed the petioles are purple but I’ve seen people say AK48 just does that naturally but the NL have the purple too, also the new growth on the AK has yellow tips and the very newest growth has a brownish/red tint to it which has had me worried for a while. any thoughts on what the deficiencies are?

i also topped the all the plants exactly 9 days ago (tried to FIM lol) and i put a lighter next to the node where they were topped so you can see how much (how little) they’ve grown in the past 9 days (keep in mind i topped them again today so you couldn’t see the half inch of growth i cutoff
 

vince514

seeker of greater knowledge
Veteran
I'm no expert but the first few pics kinda looks like ph Flux causing a lock out......it doesn't look like their drinking what your giving em either .. tho I've had similar problems when a plant is water logged
You should check out the sticky in this section from mynamestich there's tons of info on that thread it will help you out for sure I know it helps me when I'm stumped about something
 

cyat

Well-known member
Veteran
Every six hours doesn't seem long enough,maybe roots are dying off
 
I'm no expert but the first few pics kinda looks like ph Flux causing a lock out......it doesn't look like their drinking what your giving em either .. tho I've had similar problems when a plant is water logged
You should check out the sticky in this section from mynamestich there's tons of info on that thread it will help you out for sure I know it helps me when I'm stumped about something

i just calibrated my ppm and ph today and they're both on point. my ph is at 5.9 and its been steady the past week, haven't added any PH adjuster and i haven't seen any PH drifts. I'm going to lowering the flood line and see how that works out
 
Does you pH stay consistent? How often do you change the res? How big is the res?

i just calibrated my ppm and ph today and they're both on point. my ph is at 5.9 and its been steady the past week, haven't added any PH adjuster and i haven't seen any PH drifts but today makes a week since i changed my res and its 22gal but holds like 23,24 gallons
 
Yes, not enough. The medium is pH rising, causing CA Def, if you flood more often, and maybe lower pH a Lil more, the medium will get reset to proper pH more frequently. :)
 
Honestly it looks like you just need to lower pH I thought closer to 5.5 was best in hydro, 5.9 better for coco. I'm not a hydro expert tho.

And perhaps oxygenate your water a Lil more? Be careful tho airstone in a res will make pH rise some more.

Honestly I think lower pH, more often floodings, should be on track. I wouldn't add calmag until after trying a lower pH.
 
Ps when I did flood in coco, I had my pumps timed so the water was done draining 10 minutes after saturation. Basically the plants were submerged no longer than ten minutes. And I was using an airstone too.
 

vince514

seeker of greater knowledge
Veteran
okay so this situation part of you got down now the only remaining factor is a high pH of 5.9 is best served for Coco and water culture is usually 5.5 to 5.6 ...imho
 
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