Edges of leaves curling upwards, advise appreciated! :-)

[mage]

No green slime in the tank, only a small amount of dust that i will clean out this weekend.

I'm happy to report that the new 400 watt globe is the shit. I have lowered the light down to 30 cm / 12" and the temp stays at 25 deg C / 77 deg F.

The pH is getting more stable, it only rose from 5.5-6.2 today which is good.

The plant looks a lot happier too, i will post some pics this weekend. Thanks for all of the input, suggestions, ideas and help. I put an aweful lot of time and thought into the disgn/build of this set up and there were a few suggestions just ironed out the kinks to get my set up tuned perfectly.

Thanks

 

[mage]

Holy crap check this out

I'm wondering what it is. The damage is fromt he back, its like the flesh of the leave has been eaten away fromt he underneath.

The only variables i have changed is the globe which i lowered to 30cm and i also suspected there being bugs on it last night and sprayed the top with pyrethium. Before i give a proper full of coat of the stuff do you guys honestly think this looks liek bug damage or light/pesticide damage?

jesus man god hates me

 

[mage]

the damage is on the new growth too you can just kind of see it in the picture

Also in case i was epicly under feeding it and it ran out fo nutes in the tank causing some sort of deficiency i have added one teaspoon of Canna A and B into the tank. im srsly hoping this is what it is

 

[mage]

Heres some close ups

 

[resinryder]

Feed the thing. 170ppm isn't gonna cut it. At that rate there's hardly any food for it. So I'd say you are starving it. Personally, I'd raise it up to 500 to 700 ppm and see if it kicks it into gear. Your temps and light distance are ok, but I'd raise the light up to at least 18 inches above it just to be safe.
Hydronton will affect the ph but it will eventually level out.
Next time use the 1 inch rockwool cubes to root in. The ones you're using hold A LOT of water which can cause a problem early on. Too much moisture retention can cause root rot and stem rot.
Never spray pyrethium directly onto the plant. Just kinda mist it over the tops of the plants and let it settle down onto it. I lost some cuts by doing that one time. Live and learn eh. I spray above the plants with a fan blowing in their direction. Gets the pyrethium all around the plant without being sprayed directly on them causing a buildup.
Raise your ppm's and feed it man, hehe.
I would also use a calmag type product at 2ml/gallon.

 

[mage]

PPM upped to 550 in the main tank which will average out over the next day. I will up it again tommorow to stay at 500. I'll also go get some sort of calcium product to put in. I was looking at mynamesstich thread and the issue looks like mag/cal def. Am i the only one? it doesn't look so much like the thrips pic she has. That thread is pure awesome btw.

 

[resinryder]

Thrips look like VERY TINY fleas. Almost like a flick of a stick. And they jump. You seen any thing like that or any bugs at all? Thrips will leave a "snail trail" like looking thing on the leaf. They suck it from underneath and that's how it looks on the top of the leaf surface.

 

[mage]

Nah i think you're right with regards to under feeding the plant. I upped the ppm to 370 last night and the damage has stopped. the new growth is continueing to grow. so tonight i have upped it again to 500 ppm.

Man i think i took the "it's better to under feed than over feed" thing too seriously.

As far as bugs ive gone over the plant with a microscope and i cant see any movement so i think i can safly rule bugs out.

Many thanks for the input res

 

[mage]

I need some sort of rule of thumb to follow, i know that the "sun petals" (not sure what they are actually called but its what a friend of mine calls them) feed the seedling the nutrients. I also know that the plant hits the veg state when it throws out its first set of 5 fingered leaves (the third set of leaves). I think you can get away with not feeding it till the third set of leaves but its probably better to start slowly upping the food gently from when the second set are developed.

 

[Leroy Brown]

The new damage you posted really really looks like light burn to me, I would have said that even if you didn't tell me you replaced a 6 y/o bulb & moved it closer. Either way back that light way way back UNTIL you get your problems worked out and the plant looks healthy again, I'm all for rocking the light as close as possible, EXCEPT when I see problems like that, there's no sense having it so close if they can't use it, they'll tell you when they want it by literally reaching for it.

My recommendation- move the light back another foot or more. keep the ppm's where there at, watch the PH, keep the temps & airflow good, and give it some time- she'll be blowing up in no time, once that happens if you feel like the light needs to be closer again (depending how much it grows into it) do it gradually.

One thing I've learned about this plant that nobody really stresses is just how much it adapts to given situations. IE you change any condition drastically & fast, sometimes even if it's for the better they just don't like it, kinda like fish.

 

[NachoConQueso]

Here's my opinion: You have so many different problems going on right now. I can only tell you what I know from your pictures then from your description.

When I looked at the picture I thought, temps, light intensity, nutrient burn, low humidity, and/or a pH issue. Comparing that with the description...

First, temps 16-19 C? Thats 61-67 F. Fix that, try 10 F warmer on your lows and highs. Also, have you put the thermometer at the top of the plant and measured there? I've seen it where the ambient is cold and right underneath the light it's a million degrees. That's really really bad for the plant. Second, light intensity. I'm not sure how close your lamp is, but move it way up. Third, water quality. If your pH is going from 5.8 to 6.8 or whatever then you have a water problem. Get your pH under control or if the water really is that uncooperative then you have to switch to RO.

Get your pH fixed and then work on those temps my friend.

 

[mage]

Just an update, the new growth looks amazing, i will post a pic in the next day or two. Adjusting the light height and upping the ppms fixed it.

I have been running rhizotonic + cannazyme from day one. I feel like these products saved my plant in a way because the way it looked a couple of days ago i thought it would be well and truly screwed. They are expensive but good insurance xD

Not sure what to do with regards to the water. My grow shop told me the water is soft in my area. It comes out of the tap with a high pH of around 8, higher after it has been raining. Usually the pH levels out towards the end of 1 week, and next week i will install my larger tank which will only need changing every two weeks.

One stratergy i thought of was to use 1/2 spring water 1/2 tap water to lower the average pH a bit. Because the spring water seems to have its pH fixed at 7 it would help stabelise the pH, however buying 25lt of bottled spring water every fortnight isn't the most practical idea, im going to read up on alternatives sich as RO, there is an excellent thread on water efficiency that is stickied somewhere here, ill start there ...

 

[mage]

Hi!

Here's an update ...

The new growth has been explosive and looks great. the edges of the leaves are turning up slightly, but as you can see the growth looks awesome compared to before. i think is till have a problem and im guessing its the temp, so i am going to closly moniter it over the upcomming days.

Heres a pic from the side. I'm thinking about trimming the 5 finger set at the bottom because they are starting to die. I had the 3 finger set completly die and go all sorts of interesting colors so i clipped them off today.

Here's a close up of the leaves i want to clip, unfortunatly the camera had a hard time picking up the spots on it. this leafs partner of the other side the main finger was half dead (yellow) so i clipped the dead half off.

this final pic is from the top... my only worry is that there is a slight yellowing on one of the smaller fingers on the new growth. I am hoping itll be ok, but the plant as a whole is a thousand times better than it was. I think i had it an inch from death

 

[mage]

I just had an idea as to what is causing this problem.

I am running with Rhizotonic and Cannazyme and i also add an extra veg additive called psycoveg.

PsycoVeg seems to do some of the stuff that rhizo does, it says on the lable it "stimulates rapid root development". I have no idea weather this product is actually hit or shit because there isnt even any ingrediants on the lable.

 

[Leroy Brown]

Hey if you want a good read find the 'ask lucas' thread on CW, it's a good read & I learned a lot reading it start to finish.

 

[Grownz]

Get a new bulb dude!

 

[abuldur]

I would say your problem is humidity which seems to be to low.

During veg it should be around 50 60 % .

May i add that waterfarms are designed to run continuously, this is what keeps your dissolved oxygen level up.No need for a timer just keep it rocking 24/24 (this peace of advice is from General Hydroponics themselves).

And they run on air pumps, is that what you are using?

peace