Leafs almost look like they are drooping and rusting. Pics included.

[VagPuncher]

Hi.

18 Purple Kush clones in a DWC Rez

Temp never goes over 84

Rez temp steady at 71

2 x 430 watt Sunagro

Just added some Micro, Grow, Bloom and B52

I AM NOT overwatering. I have unplugged the air pump that waters them. I water them manually because they will get water logged.

Whats the verdict?

 

[Greenthing]

Hi.

18 Purple Kush clones in a DWC Rez

Temp never goes over 84

Rez temp steady at 71

2 x 430 watt Sunagro

Just added some Micro, Grow, Bloom and B52

I AM NOT overwatering.

Underwatering can have the same effect as overwatering.
I dont know if thats your problem though.

 

[FreedomFGHTR]

Whats the pH? Why would you unplug the airpump? You need it to increase the dissolved oxygen levels in the water. With DWC it isn't over/underwatering that is a concern, because they are supposed to have their roots submerged deep in water. Oxygen or lack thereof is the concern in DWC that and a stable pH.

 

[Jedi]

from a diastance it looks like Cal/Mag defect...

PH , Temptarure , oxygen and rootrot could olso do that

Epsom salts fixed my problem...!!111

 

[VagPuncher]

Whats the pH? Why would you unplug the airpump? You need it to increase the dissolved oxygen levels in the water. With DWC it isn't over/underwatering that is a concern, because they are supposed to have their roots submerged deep in water. Oxygen or lack thereof is the concern in DWC that and a stable pH.

Sorry!

I mean the water pump. The are drip fed twice a day if I leave it plugged in. Younger plants get water logged. The air pump is still fizzing the 4 air stones along nicely.

 

[VagPuncher]

PH is steady at 5.6-6.0 at all times.

 

[VagPuncher]

Please Help me

 

[Hydro-Soil]

Please Help me

3-part General Hydroponic nutes? Or something else?

If it's GH nutes, dump the 'Grow' and your res.

Refill with RO water and count your gallons.

Mix in 8ml of Micro for each gallon your res holds.
Mix it well.
Mix in 16ml of bloom per gallon your res holds.
Mix it well.

pH it to 5.8

If you have any roots hanging down into the res, make sure you have at least 1 watt of air-pump power per gallon of water.

You'll see a speedy recovery within 2-3 days.

Edit: This is the formula worked up by pH that Lucas is famous for spreading around the net. Follow the Lucas Formula link if you're interested in the nitty gritty.

 

[cyberwax]

This is not your first grow no? Did you clean your res properly before you initiated the grow?

 

[kmk420kali]

Sorry!

I mean the water pump. The are drip fed twice a day if I leave it plugged in. Younger plants get water logged. The air pump is still fizzing the 4 air stones along nicely.

If it is hot at all where you are at, 2 times a day drip will not do it-- They seem to be drying out-- Try upping your waterings, and lowering the amount of nutes-- Splash 'em 7-8 times a day, but pump the res with airstones big time-- Don't water-log them, but don't let them dry out--

 

[VagPuncher]

This is not your first grow no? Did you clean your res properly before you initiated the grow?

Yes sir. First with a Hydro-Peroxide and water. Then with 10% bleach mix. Then with plain water.

The rez is clean as could be.

 

[VagPuncher]

If it is hot at all where you are at, 2 times a day drip will not do it-- They seem to be drying out-- Try upping your waterings, and lowering the amount of nutes-- Splash 'em 7-8 times a day, but pump the res with airstones big time-- Don't water-log them, but don't let them dry out--

Its twice a day for 15 minutes. They are waterd well.

 

[VagPuncher]

I am gonna do a rez change tmrw!

I will flush for one day with PH balanced water and H.Peroxide.

I will then do another Rez change on Thursday with water and 75% nutes and get back to everybody.

 

[D.I.trY]

Hi.

18 Purple Kush clones in a DWC Rez

.......

I AM NOT overwatering. I have unplugged the air pump that waters them. I water them manually because they will get water logged.
?

Am i being stupid here but what do you mean about overwatering in a dwc res? You have no medium in there right? well if it is, what on earth does that mean haha. Also watering with an airpump? Wow ive never heard of that, maybe its done but seems unlikely to me!

You gotta get that water oxgenated to get the healthy root system to perk those leaves up! And I have found that plants really like being in water warmer than 71 BUT and its a big but, the roots are more vulnerable to pithium attack or slime. I'm confident you can totally eradicate this threat just the way nature does it in soil - by having a colony on beneificial bacteria covering the whole surface of the roots, giving a protective barrier.

Please can you help clear my confusion? thanks

 

[VagPuncher]

Am i being stupid here but what do you mean about overwatering in a dwc res? You have no medium in there right? well if it is, what on earth does that mean haha. Also watering with an airpump? Wow ive never heard of that, maybe its done but seems unlikely to me!

You gotta get that water oxgenated to get the healthy root system to perk those leaves up! And I have found that plants really like being in water warmer than 71 BUT and its a big but, the roots are more vulnerable to pithium attack or slime. I'm confident you can totally eradicate this threat just the way nature does it in soil - by having a colony on beneificial bacteria covering the whole surface of the roots, giving a protective barrier.

Please can you help clear my confusion? thanks

Hey bud,

Sorry for the mix up. Let me try again.

I have 18 P.Kush plants in a DWC system. All the plants are hanging over one 50litre rez. Each plant also gets drip fed for 15 minutes before the lights go on and 15 minutes before the lights go off. The plants are in 3inch rockwool.

There are 4 airstones in the Rez.

I unhooked the water pump so they wouldnt get fed twice a day as that water logs them. The air pump and airstones are still chugging along nicely.

I manually hook up the water pump and feed them every 2 days. Eventually when they have bigger roots and need more water ill let the machine go on auto pilot and feed them twice.

I hope that a better explanation.

 

[cyberwax]

hmm, if your plants are in a dwc system there should be no need for the extra feeding, if the plants have their roots submerged in water whats the point? You will only end up getting stem rot. Or am i missing something?

also, i had a wilting of your sort adding h202 directly to the res, so make sure you dilute it before you add it.

 

[D.I.trY]

id say its a root health problem there mate. So are the roots growing down in the water below or still stuck in the rockwool? Plants that size surely must be. the rockwool would get wet from the bubbling spray from the airstones alone so its not necessary to water from above. Or is the rockwool sitting in the water? Maybe a large chunk of saturated rockwool over the rootball is not a good thing. Maybe tear some of it away?

 

[D.I.trY]

I unhooked the water pump so they wouldnt get fed twice a day as that water logs them. The air pump and airstones are still chugging along nicely.

I manually hook up the water pump and feed them every 2 days. Eventually when they have bigger roots and need more water ill let the machine go on auto pilot and feed them twice.

feed them? the Dwc should already have the feed in solution

 

[VagPuncher]

id say its a root health problem there mate. So are the roots growing down in the water below or still stuck in the rockwool? Plants that size surely must be. the rockwool would get wet from the bubbling spray from the airstones alone so its not necessary to water from above. Or is the rockwool sitting in the water? Maybe a large chunk of saturated rockwool over the rootball is not a good thing. Maybe tear some of it away?

Hi D.I,

The roots are just starting to touch the water. Theyre in the 2nd week of veg (clones)

The rockwool is about 3/4 of an inch above the water right now.

I think ill let the roots submerge themselves in the solution and see how they act.

I did the rez change today.

Ph balanced (5.8) water with H2o2 and 10 mill of Dutchmaster zone.

Ill let them sit in it for 24 hours and give them one full water only feeding from the drip system.

Ill get back to you all with the status.

 

[Hydro-Soil]

Hi D.I,

The roots are just starting to touch the water. Theyre in the 2nd week of veg (clones)

The rockwool is about 3/4 of an inch above the water right now.

I think ill let the roots submerge themselves in the solution and see how they act.

I did the rez change today.

Ph balanced (5.8) water with H2o2 and 10 mill of Dutchmaster zone.

Ill let them sit in it for 24 hours and give them one full water only feeding from the drip system.

Ill get back to you all with the status.

Ok, now that the roots are going to be hitting the water you'll need to make sure you have at least 1 watt of air-pump power per gallon of water in that thing. I'd suggest adding even more if you're in a warmer environment and the res will be at around 70F.
Keep in mind that it wasn't designed specifically for cannabis and most plants do just fine with the little airpump it's built with. You would do well to add at least one extra pump to it.

As soon as all plants have roots hitting the water, change the res to whatever nutes you're using and make sure you stop top watering.

Bubbles popping on the surface of the res also speed the growth of roots dramatically. The roots follow the tiny droplets of water down.