Are they ok? Critical AutoAuto

Hello ozzy, , I can see burned tips, it is a little nutrient burn, you need to reduce a+b back to 0.5ml/l for a week or so. Can you upload full size picture of both plants

JohnySmith1 said:

Hello ozzy, , I can see burned tips, it is a little nutrient burn, you need to reduce a+b back to 0.5ml/l for a week or so. Can you upload full size picture of both plants

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Hiya, So adding a boost could not caused it? Those spots are like dark red/purple only on the edges. 0.5ml/l seems to be not really much for that old plant? Thanks Johny

I thought as well that this is maybe any deficiency like phosphorus?? Or definitely nutrient burn?

Ozzy I know from my experience autos don't like nutrients, also well known member in the post above mentioned it too. I also know that canna coco has perfect ratio of NPK thus if there was a deficiency it would be multiple and growth would be stunted. I can see a good progress and a healthy colour, if not including this odd spots and burned tips your plants are very healthy which is why I dont think it can be deficiency, but for sure there is always a little chance that I am wrong. You can always try both ways as you have two plants, this would be great educational experience.

JohnySmith1 said:

Ozzy I know from my experience autos don't like nutrients, also well known member in the post above mentioned it too. I also know that canna coco has perfect ratio of NPK thus if there was a deficiency it would be multiple and growth would be stunted. I can see a good progress and a healthy colour, if not including this odd spots and burned tips your plants are very healthy which is why I dont think it can be deficiency, but for sure there is always a little chance that I am wrong. You can always try both ways as you have two plants, this would be great educational experience.[/Q

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Plants are growing about 1cm a day in height. Tomorrow is a feed day so I will reduce the dose on one of the plants and let's see.

Just the a quick photo update. I gave them nutes as we said yesterday. The one on the left received weaker dose. What might cause this wilting? Is it because a dry day yesterday? The top of the plant on the right wilted quite a bit like never before. Going to work soon hoping they will look better after a few hours.

Hello ozzy, the plant on the right is not looking well at all, but don't worry we will find a problem, but you will have to do some work.
Make a full update when you comeback from work. I need next info.
Some pictures from different angles.
For Nutrient solution:
pH, PPM(hope you followed my advice and bought TDS meter), temperature of water before in goes in the coco, colour of water, and the ratio of each nutrient and additive per litter of water.

For Run-off:
pH, PPM, colour of water(how close it is to colour of nutrient solution, whether it is richer or weaker)

General:
How many times a day do you water?
After dry day, how much water goes in, before run-off start to come out?
What's humidity and temperature inside the tent?
Are your plants receive constant wind imitation?
Have you been doing anything off the schedule? (Like adding some other additives and not letting us know?)
What do you use to correct the pH?

Hi Johny,
Info:
Ph of nutes is 5.8 most of the times.
Ph of plain water is 6.5 from last few days.
temperatures in tent are vary as this is loft grow so between 14 to 33 celsius. Humidity is quite a big range as well.

When I water I do only once a day until will get around 30% run off. And usually is between 800ml and 1l each plant. Temperature of water is depend what temperature is on the loft and yesterday water was 15 celsius. Before I was not checking. Ph of run off yesterday was around 6.2. And colour always seems to be darker than the water coming in.
I do have tds meter but used only once to check ppm of my tap water and it was around 90.
Nutes as we said plus 0.25ml/L of magne cal and last 2 feeding gave them a boost 0.5ml/L
For ph down I use liquid from company called growth technology phosphoric acid 81%. Did I missed anything? Photos shortly
Thanks Johny

The air circulation is not big though it is just an intake fan blowing into the reflector an hopefully the air is bouncing back a bit. You can see on one pic.

Some with better light

Ozzy T. said:

Hi Johny,
Info:
Ph of nutes is 5.8 most of the times.
Ph of plain water is 6.5 from last few days.
temperatures in tent are vary as this is loft grow so between 14 to 33 celsius. Humidity is quite a big range as well.

When I water I do only once a day until will get around 30% run off. And usually is between 800ml and 1l each plant. Temperature of water is depend what temperature is on the loft and yesterday water was 15 celsius. Before I was not checking. Ph of run off yesterday was around 6.2. And colour always seems to be darker than the water coming in.
I do have tds meter but used only once to check ppm of my tap water and it was around 90.
Nutes as we said plus 0.25ml/L of magne cal and last 2 feeding gave them a boost 0.5ml/L
For ph down I use liquid from company called growth technology phosphoric acid 81%. Did I missed anything? Photos shortly
Thanks Johny

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When you give plain water pH must be 5.8 too, 6.5 too alkaline for coco, and phosphoric acid is perfectly fine to correct the pH. Now it's obvious that all this spots are coming from pH fluctuation. I am sure I did mention in one of my posts about always keeping pH at 5.8.
You need to water 3 times a day now or at least 2 time, and there is no need for 30% run-off, collect just enough to take some reading (50-100 ml).
15 degrees water is critically low, get some air pump and air stones, put your nutrient solution bubbling in the warm room until it gets to 18-20 degrees. I think your plants wilting after you water it only because root zone become too cold. Keep recording next readings - pH, PPM, temperature of nutrient solution and plain water, same for run-off. If colour of run-off much darker that the sign of your coco to be saturated with nutrients.
My advice to you is to keep on giving it 0.5ml/l of a+b 0.5ml/l of accelerator, 0.25ml/l PK boost and 0.25 ml/l of mgne/cal, follow the same schedule feed/water/dry.
When your run-off PPM are reducing every time you take readings that the indicator to increase the concentration of nutrients. If it is growing with every reading, you giving too much food, perfect scenario is when PPMs are stay the same or very close.

What are air stones I have never heard about them. What do you mean by air pump as well buddy? I keep my water in the bottles so it is difficult to add there anything. I can try to wrap bottles in something to make sure that they are never that cold.

Ozzy T. said:

What are air stones I have never heard about them. What do you mean by air pump as well buddy? I keep my water in the bottles so it is difficult to add there anything. I can try to wrap bottles in something to make sure that they are never that cold.

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https://www.google.co.uk/search?q=air+pump+with+stones&biw=1920&bih=979&source=lnms&tbm=isch&sa=X&ei=KYhjVe6VLcy3sQH8j4GADQ&ved=0CAYQ_AUoAQ#imgrc=wSUkE_898Nrr0M%3A;h6j1FGY5izmevM;http%3A%2F%2Fthumbs2.ebaystatic.com%2Fd%2Fl225%2Fm%2FmEpb2r2_W_BMkp9pzfcMf2Q.jpg;http%3A%2F%2Fwww.ebay.co.uk%2Fbhp%2Fair-stone-pump;225;225 something like this, The air pump that is use in DWC systems, it's not necessary but it will saturate water with oxygen and with in couple of hours will bring it close to room temperature, but don't worry about it as long as water 18-20 degrees regardless how you achieve this temperature. Warping it in the towel will only keep it cold for longer, you just need to keep your water in the room that is about 20 degrees.

You can keep it in your tent, just don't let any light to get in the water.

And also the plant on the left is flowering much less than the other one. Photo of the run off from last few days attached. Seems to be always much darker that thae water coming in. Just watered the sick plant and ppm coming in was 445 and run off is 185.

JohnySmith1 said:

You can keep it in your tent, just don't let any light to get in the water.

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Quite funny coz I had it in the tent today for the very first time

Personally I get my water straight from the tap, it comes out at about 13 degrees or so, than I mix all my nutrient and let it bubble for couple of hours, If you keep your water in the bottles for a long time, you can get some algae or other type of slime that is no good for plants. Especially if some light is getting in the water.

Ozzy T. said:

And also the plant on the left is flowering much less than the other one. Photo of the run off from last few days attached. Seems to be always much darker that thae water coming in. Just watered the sick plant and ppm coming in was 445 and run off is 185.

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wow unexpected reading, than you better increase your a+b to 1ml/l ) And keep on recording the readings mate

perhaps run-off is darker because there is some dirt, you need to filter run-off with coffee filter to do a correct visual spectrophotometry but since you have a TDS meter don't worry about it.

The other plant 355ppm and 157ppm.