Leafs pointing down dwc
- Thread starter Grow2019
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BostonBuds
Well-Known Member
Those photos before or after the changes?
Logan Burke
Well-Known Member
Hmmmm....Do you happen to notice the droopiness when your light first turns on? I know that when lights first come on, my plant's leaves are always kinda droopy especially if it's a cold lights off period for them. Your PH was way to high, correcting that may have solved the problem. A ppm of 800 I would say is too much for autos, but I think the 450 you dropped it to should work better. DWC is my preferred method of growing because you can let the PH and PPM's reaction guide you. What are your water temps and air temps? Are your roots looking white and healthy? Does your PH drop/rise on a day-to-day basis?
Hydro4life
Well-Known Member
Threw you a few likes, being a new member!! Thats right. 5.8 for Dwc. The ppm depends on the plant and it's age. Get your ph in check 1st. Very important. Before I used ph perfect from advanced nutrients, I used to get my res down to 5.5 and let it climb to 6 - 6.2 then top up, get my ppm to where I wanted it then ph down to 5.5 again. I found that way it could absorb alot more in the ph range. As for ppm being too high, it doesn't look too dark green or have burnt tips, so my guess is its ok...? Don't know what the quality of your water is like? Is there a good exchange of fresh air/co2? Also how is the oxygen to the roots? Plenty of small bubbles??
Hydro4life
Well-Known Member
Not sure about gallons but i put 2 to 3 in a 10 litre bucket! You want oxygen to your roots and co2 is what the plants breathe in and helps with photosynthesis. (There is around 300 - 400ppm of co2 in fresh air) so fresh air exchange in the grow room is super important if not running a sealed room and supplementing co2.
Hydro4life
Well-Known Member
Try dropping your ph down a bit more. Hydro ph off the top of my head should be between 5.5 - 6 with 5.7 to 5.8 being ideal. And yes get your ppm to where you want it then ph your water. And I always found my ph would rise unless I had root issues then it would drop and thats when i would panic lol.
Hydro4life
Well-Known Member
Nute burn is a dead give away that your ppm is too high but it can still be a little too high without showing nute burn. In veg the veg nutes you use are higher in nitrogen. Generally you can look at the colour green the plant/s is. (Strain dependant also as some strains are slightly lighter or darker than others) if the plant is a really light green, especially lower leaves you may need to up the ppm. If leaves are very dark you may need to drop the ppm. Also a sign of too much nitrogen is the claw. (Clawing down of leaf tips) yours may be starting to get that by what i could see in the pictures...? Also new growth can be quite skinny. So long story short, yes you may need to back off on the nutes a little? But not much in my opinion. Hope that all helps and makes sense.
Logan Burke
Well-Known Member
Ok I understand. I would start checking your PH daily simply to catalogue it so you can look back and see how your plants are responding to your PPMs and etc. Airstones aren't what determine your o2, your airpump and how many lpm's are what will determine that along with water temp. But if your roots look healthy, I doubt this is your issue. So, with DWC the reason you want to check PH and PPM daily is to determine how you need to adjust or if you need too. If your PH rises and your PPM's drop, this is an indication that your plant is wanting a higher PPM solution. If your PH drops and your PPM's rise, this is an indication that your plant is drinking water faster than it is absorbing nutrients and that you should decrease your PPM. This is not universally the case, and if you'd like me too I can get deeper into this
But at a very general level that is the idea. You want to get to a point where both PH and PPM's remain pretty static. If PH drops by 0.1, don't freak, let it go. If it starts to drop by more than 0.1 or 0.2 in a day, this is when you should raise an eyebrow.
Logan Burke
Well-Known Member
Yes, 5.8 is the sweetspot same for photos. As far as ppm's go, it really is strain dependant. I've had auto's tolerate ppm's very close to 1000. I've had auto's not want anything over 600-800 before. This is why monitoring your plant's reaction to the nutrient levels is so important, because different strains can prefer such different ppms.
Thanks alot, So backoff on nutrient a little and start my ph @ 5.5 also i need to correct the ph dailey, plant is drinking a lot of water so can I add water to the 5 gallon bucket dailey add more nuts 650ppm then ph again, seams like I shouldn't have to add water dailey im using Cobbs for lighting so there is know heat, temp @ 72 steady degrees. I'm sorry for so many question but this is new for me.
Logan Burke
Well-Known Member
Sounds like you've got a plan If you find your PH is staying the same and not rising, you may consider adjusting it to 5.8. But if it rises, then 5.5 should work great allowing it the PH to rise right to the sweet spot of 5.8 to 6.0. Do you use standalone 5 gallon buckets, or are they all connected together? And no problem at all, no one starts DWC without a million questions! It can just be hard to get accurate answers!
If you find your PH is staying the same and not rising, you may consider adjusting it to 5.8. But if it rises, then 5.5 should work great allowing it the PH to rise right to the sweet spot of 5.8 to 6.0. Do you use standalone 5 gallon buckets, or are they all connected together? And no problem at all, no one starts DWC without a million questions! It can just be hard to get accurate answers!
Hydro4life
Well-Known Member
I've never grown autos so can't comment on that side of things. And totally agree with you Logan. It's about reading your plants and how they react. I've been out of the ph'ing side of things for about 3 years now and you bought back a few memories lol. But I think grow 2019 needs to sort out his ph and keep a close eye on what it's doing. Not much room for error with dwc.
Hydro4life
Well-Known Member
Yep that's what i would do if I were you. And as Logan said only set to 5.5 if ph is constantly rising. Check on your ph daily. And that's what it's all about. Gotta ask questions or you won't get any answers.