Update to my plant symptoms - updated pictures - help needed

Hi - I posted a thread the other day entitled 'Help diagnose problem - pictures for reference'. Mag and Nitrogen deficiency came to mind. I ultimately changed and did a new batch of nutrients and some of the yellow went out of the plants. I think general concensus was also that temp was too high in the box. It gets around 92 with lights on. (90 today with 60% humidity) Fellow grower in this area keeps entire grow area around 95 degrees all year and he advised temp wasn't a problem. But, he also grows in soil and they are in an open room. I have circulating air on ours in the grow box but am thinking of moving to cooler room so intake air will hopefully keep temp down some.

ANYWAY - Here are updated pics. The roots actually are looking better than they did. (kind of look dark in the picture but they aren't as dark as they look) The leaves were getting more green back to them (you can look at the pics in the earlier thread mentioned above). But now they have spots on them now as the pictures show. I'm wondering if it's heat or if this is just trauma from the problems the other day. The only thing is some of the new smaller leaves have a curled brown tip.

Have a DWC system and using Technaflora nutrients but open to other suggestions. Thanks for the input.

OUCH!
1st-- flush your system for about 6-8 hours... just water- don't even adjust the pH...
Now-- what feeding schedule you using???
What is your pH running?
Have you checked the PPM's/ec after adding your nutes?
After the flush- add fresh nutes and adjust your pH to 5.9-6.2

She's either really locked-up or very underfed... AND the temps should never get over 80-85f if you don't run CO2 or have a LOT of intake and fans going-- they're cooking in there!

Your cloner isn't clear is it?? If so- you need to wrap the sides in duct tape or silver thermal blanket fabric to keep out light...

Here's the link I have for the Technaflora feeding calculator-- http://www.technaflora.com/recipeforsuccess

Hope that helps!

Looks like the brown roots is the cause of this get some h202 in the res every 4 days.

Thanks Lady Zandra- Here's what we have going:

We had it on transplanting stage 1st week then changed to vegetative state (mixed per Technaflora instructions)
Mixed for 3 gallons : BC Boost 9 tsp, BC Grow, 4.5 tsp, Thrive Alive B-1Red 1.5 tsp, Magical 1.5 tsp and Sugar Daddy 6 tsp.

Water runs 15min every 3 hours. Res level is right at bottom of pots.
PH is urine colored, as best we can tell by the chart it is at 6.
PPM is 965 right now in res

We don't have cloner yet. A friend cloned for us and the young plants came to us in rockwool cubes.

We have a warm sugar water and brewers yeast bowl in there to up the CO2. We only have a fan going and exhaust fan. I was wondering if I added an intake fan it would help a bunch. The room it's in is never below 80 during the day so wondering also if I need to move into air conditioned part of house so circulating air is cooler to begin with.

I also saw on a post a few min ago that you should run the Technaflora nutes at 50% of what they recommend. What is your thought on that?

We were going over to the supply house tomorrow. I'll try to get some there.

Thanks, will do.

Uh oh! You only have the airpump on 15 minutes every 3 hours??? That's a DWC right??? 15 minutes per 3 hours is usually for a drip-only or flood & fill system...
The air pump should be on for at LEAST 1/2 hour out of every hour if in DWC (submerged roots)-- or they drown!

The nutes should really be mixed per the manufacturer directions-but ALSO adjusted according to the ppm's...
there are actually 2 different PPM charts- depending on the meter you use (like it isn't already confusing enough!) That's why I prefer to use EC instead-- but there is a chart below for PPM-vs-EC...

We keep our EC around 1.o-1.3 for the 1st part of veg- working up to 1.5 IF it is a strain that is a heavy eater.... then start at that same EC in 12/12 and work up to 1.8-2.0 just before flushing...
the chart should show you what those equivalents are in PPM's according to your meter
View attachment 2679144

Lady Z--I'm sorry, I mean the water circulation up to the plants (the drip portion) is on 15min every 3 hours. The air pump is on all the time. Well, I was told this is a DWC - The reservoir is filled up to the bottom of the cups and roots hang down into the water/nutes. Then during the 15 min period it pumps water up to the plants in a drip as well. DWC, right?

Okay - then their veg EC when mixed according to what I noted above puts EC at 2.0. So, if I'm thinking straight here then when we mix we need to proportionately lower the mixture to lower the EC.

We had a gut feel that we needed to flush it and when you recommended it he went ahead and flushed it. So, after we do I'll mix up a new batch of nutes and adjust the EC to the lower amount 1-1.3 and go from there. The roots don't have a slime so do we even worry about their appearance (see pic) until after we flush it all?

Thanks for all your help.

Did as you suggested. We flushed the system 6-8 hours. Then mixed a new batch of nutes up for veg stage but adjusted EC to 1, which ended up equating to about 50% of the mfg mix. PH is 6. We also moved the box into an air conditioned room. It has lowered the temp of the water to 70-72 and air temp to no more than 80. Our roots aren't slimy but they also aren't very robust. We have H202 but with the plants being young didn't just want to add it without trying the above solutions first. I am adding pictures taken today 6/1. First three are from this morning last two are after light cycle all day. New growth looks better (still not quite right) and yellowed leaves have just continued to die. Guess that's normal. Any observations?

Those symptoms are from potassium deficiency. In general, if you're growing at higher temperatures, high levels of potassium makes more of a difference since the plant needs to transpire a lot more.

This is not over fert and the solution isn't to flush and lower ppm! 965ppm is perfect. Don't lower it.

If you just raised it to 965ppm from something lower, just wait for things to fix themselves. You said yourself things were getting better with the new nutrients.