Live Stoner Chat Possible over-fert?

[cantbuymeloveuh]

Okay changed water last night and upon inspection I found some problems with the leaves. The problem is on 2 bottom leafs and the very top leafs. Other than the pics below the plant is coming along nicely, she is starting to flower and is all types of stinky. The picture with the fan leafs, I just cut them off at the stem. I changed water and went down to 600ppm with 15ml floura A and 15ml of floura B) I believe it could be too much N but I see some similarities in K deficiency too. I look at the top leaves (with the flower) and I think i see heat stress. What do yall think?

HSO lost coast skunk
4 weeks (from seed)
3 gallon DWC/TOP FEED
Water temp 68F
PH 5.7-5.9 *( I have a PH monitor and doser, it automatically keeps my water between 5.7-5.96)
Roots are nice and white
Stems are firm and green
Box temp is in the low 80's with 40 RH
GH flouraduo A&B
750PPM (30ML FLOURO A % 15ML FLOURA B)
Co2 boost bucket

 

[cantbuymeloveuh]

Well, looking at my fan placement I am pretty positive the top damage is due to heat spots as there was no circulation in that specific area. The bottom thou is still a bit of a mystery...but boy is she stinkyyyy holy fuck.

 

[MedGrower]

My quick 2 cents. Since you are doing DWC, follow EC and pH daily. If the EC goes up, that means the feed is too strong. If the EC goes down, feed is too light. Usually pH does act up on that too but in inverse manner; If EC goes up, pH usually goes down and visa versa. You want to aim to that sweet spot with your feed where the EC stays stable and your plant should be super happy.

I am not sure what is the NPK of your feed there but you might want to check that your plant gets enough potassium. Sometimes the defiency can show up from the tips like that before it goes worse. But like you said, most likely it might just be due to heat if there was no circulation. Lower leaves there sometimes can have little spots like that, those might be caused by just water droplets from the feed. Your pH being below 6 can make your plant prone for Ca defiency and it can also show up as brown spots on the leaves like that. But do not worry if that is not spreading, most likely it is just an anomaly. Hope this helps bro.

 

[cantbuymeloveuh]

My quick 2 cents. Since you are doing DWC, follow EC and pH daily. If the EC goes up, that means the feed is too strong. If the EC goes down, feed is too light. Usually pH does act up on that too but in inverse manner; If EC goes up, pH usually goes down and visa versa. You want to aim to that sweet spot with your feed where the EC stays stable and your plant should be super happy.

I am not sure what is the NPK of your feed there but you might want to check that your plant gets enough potassium. Sometimes the defiency can show up from the tips like that before it goes worse. But like you said, most likely it might just be due to heat if there was no circulation. Lower leaves there sometimes can have little spots like that, those might be caused by just water droplets from the feed. Your pH being below 6 can make your plant prone for Ca defiency and it can also show up as brown spots on the leaves like that. But do not worry if that is not spreading, most likely it is just an anomaly. Hope this helps bro.

Okay, I have read in allot of different areas that 5.8 PH for hydro is the sweet spot.What parameters are you recommending? My PH is monitored by this (see link at bottom). Whenever the PH goes below 5.7 or above 6, it automatically feeds PH up or PH down (solution) into the water. The PH never falls out of those parameters. Now onto the water and PPM. I have a float valve in the reservoir that will feed PH'd water into the reservoir when the water level drops (think of your toilet and how it fill the water closet back up with water). So with that being said I cannot currently monitor my PPM rise or fall until I disconnect my spare water tank. I have attached a pic so you can see the automatic PH set up. I am using General Hydroponics Flouraduo A and B (attached is a link).




http://www.2daydeliver.com/product_detail.php?id=SKUB001EHJO5K#.V0n0-eT2dnk
http://generalhydroponics.com/floraduo/

 

[MedGrower]

I do not have experience with the General Hydroponics -line of nutrients nor do I know how well they are chelated so I do not feel certain enought to recommend any specific pH ranges for you. But what I can say is that in my experience I've had best results having the pH at 6.2 during the vegetation and then bringing it down to 6.0 for flowering. Also, over the course of a week a steady rotation between 6.2 to 5.8 might ensure good uptake of each element.

Yeah, I am aware that most people recommend 5.8 pH but in my experience I tend to just get rusty spots and issues like that due to lesser absorbance of Ca and Mg. That certainly is really nice and sweet pH monitor and setup by the sounds of it! IMHO it is just as important to monitor your PPM's as it is to monitor the pH. Each strain and phenotype tends to like to eat different amounts and you get the best and most reliable bearings on what is going on from there before any adverse effects are even noticed. Hope this helps bro.

 

[cantbuymeloveuh]

Yea the whole grow box is pretty nice. The guys at Growbox usa really know how to put together an ALMOST fool proof setup. I just wish this particular model was about 1 foot taller.