L
littlebopeep
Guest
All messed up and nowhere to go?
oh dear this is quite depressing
I transferred the seedlings into the nft trays and immediately I encountered problems that have left me at quite a loss for a few days .. unfortunately I think I am going to lose this grow
all of the conditions concerning ec and ph are in a good range however we hit a huge heat wave and temps soared out side to 43 ºc and within the room temps raised to just over 25ºc even with the a/c going at full whack
I started noticing a bleaching of leaves and after 4 days I started getting very concerned. At first I worried about the light being too close so I raised it to about 45 inches and reduced it down to the seedling setting, just in case.
I didn't understand what was going on so truly confused I tried foliar feeding with cal mag, altered the timings on the pump, spent days pouring over pics of illnesses,nute defs etc, only to see the plants slowly deteriorating in front of my eyes. Now by this stage it was breaking my heart: I've never seen this happen before and I didn't have the answer ready to hand.
Now from experience I know with a auto grow that at this stage we have a huge increase in vegetative growth to enable the plant to have enough size to yield enough weight and this problem couldn't have arrived at a worse time. No matter what possible scenario and solution I tried, things kept getting worse. I started seeing yellowing in new growth as well and necrosis of older leaves ..
hope you guys appreciate the two flies in the photo as my new models
Desperately trying to work out what was happening ...
OK here's some of the pics (and they look even worse on film than in real life!)
Having pretty much ruled out pH, high room temps, cal-mag def (although this may be there too) various nute lockouts, defs and overfeeds, I then decided to lift one of the pots to look at the roots:
ok thats a root problem yes ?
Now I've a bubbler in the 90 L rez tank, so I didnt think I was overwatering because the aspect of the plant wasnt droopy? - but roots shouldn't be that colour ...
Its a new set up, new room, new nfts etc ... elimination led me to water temps ...mmmmmmmm ok I tested these and in the main rez I had a reading of 28.5.
Why is the water temp higher than the room temps as the main room temp is 25 and normally you would see at least a 3ºc temperature difference, I have to conclude that the tiles on the floor are conducting heat from outside of the grow room. The whole house consists of tiled ceramic flooring, and the room is on the first floor (in a corner of the house with 2 outside walls). I've just checked the water temp coming out of the taps .. and its 28.2C.
From what I've read today on this, these higher end water temps prevent the roots uptaking oxygen (hence root damage), plus it encourages any present pythium (water comes from a storage tank) to flourish .. so given that there may be slight transplant shock to roots as they are moved onto the NFT tray, has just led to the plants being starved no matter how diligently I adhered to a feeding regime.
Anyway because of the stage the plants are at I think I have to end the trial as I wont be able to see the full potential of this new light system and have to start again ..
ooops
ok so I'm pretty gutted. Thank god for Stitch's Super Stinkys (I just got 500g off 2 plants) .. incredibly sativa based high means nothing quite matters so much at the mo!
However what I have to remember are the following points so I can take something from this grow and move on with a little more knowledge:
1. the need to insulate the grow tank from the tiled floor
2. in extreme temps when using a recycling system the need to take more care of my rez temps
3. in extreme temps to consider the use of a water chiller
4. recognise the symptoms at a earler stage and be more prompt with my diagnosis
5. what a bastard pythium can be when it takes a toe hold in a hydroponic system
ok this is what I'm going to do now AND PLEASE JUMP IN IF YOU THINK I'VE GOT IT WRONG OR THERE ARE THINGS I'VE MISSED!
> add h2o2 to the system at the dilution rate of 0.5 % of H2o2(17.5%)v 50 mil per hundred L of solution
> insulate the tank with 25 mm polysterene sheeting to protect from the tiled floor .. hell i insulated last winter to protect from the cold .. it makes sense ..
> add bottles of iced water to the rez to try and reduce the temp
> cross my fingers and hope for a miracle
> save up for a water chiller for next year?
> consider sticking with coco-perlite during the summer months?
> accept the fact that I am going to have a substandard grow......however something is better than nothing
>reduce the ec
>foliar feed for a week
if anyone has any suggestions then please pipe up I could do with it!
cheers
LBP
oh dear this is quite depressing
I transferred the seedlings into the nft trays and immediately I encountered problems that have left me at quite a loss for a few days .. unfortunately I think I am going to lose this grow
all of the conditions concerning ec and ph are in a good range however we hit a huge heat wave and temps soared out side to 43 ºc and within the room temps raised to just over 25ºc even with the a/c going at full whack
I started noticing a bleaching of leaves and after 4 days I started getting very concerned. At first I worried about the light being too close so I raised it to about 45 inches and reduced it down to the seedling setting, just in case.
I didn't understand what was going on so truly confused I tried foliar feeding with cal mag, altered the timings on the pump, spent days pouring over pics of illnesses,nute defs etc, only to see the plants slowly deteriorating in front of my eyes. Now by this stage it was breaking my heart: I've never seen this happen before and I didn't have the answer ready to hand.
Now from experience I know with a auto grow that at this stage we have a huge increase in vegetative growth to enable the plant to have enough size to yield enough weight and this problem couldn't have arrived at a worse time. No matter what possible scenario and solution I tried, things kept getting worse. I started seeing yellowing in new growth as well and necrosis of older leaves ..
hope you guys appreciate the two flies in the photo as my new models
Desperately trying to work out what was happening ...
OK here's some of the pics (and they look even worse on film than in real life!)
Having pretty much ruled out pH, high room temps, cal-mag def (although this may be there too) various nute lockouts, defs and overfeeds, I then decided to lift one of the pots to look at the roots:
ok thats a root problem yes ?
Now I've a bubbler in the 90 L rez tank, so I didnt think I was overwatering because the aspect of the plant wasnt droopy? - but roots shouldn't be that colour ...
Its a new set up, new room, new nfts etc ... elimination led me to water temps ...mmmmmmmm ok I tested these and in the main rez I had a reading of 28.5.
Why is the water temp higher than the room temps as the main room temp is 25 and normally you would see at least a 3ºc temperature difference, I have to conclude that the tiles on the floor are conducting heat from outside of the grow room. The whole house consists of tiled ceramic flooring, and the room is on the first floor (in a corner of the house with 2 outside walls). I've just checked the water temp coming out of the taps .. and its 28.2C.
From what I've read today on this, these higher end water temps prevent the roots uptaking oxygen (hence root damage), plus it encourages any present pythium (water comes from a storage tank) to flourish .. so given that there may be slight transplant shock to roots as they are moved onto the NFT tray, has just led to the plants being starved no matter how diligently I adhered to a feeding regime.
Anyway because of the stage the plants are at I think I have to end the trial as I wont be able to see the full potential of this new light system and have to start again ..
ooops
ok so I'm pretty gutted. Thank god for Stitch's Super Stinkys (I just got 500g off 2 plants) .. incredibly sativa based high means nothing quite matters so much at the mo!
However what I have to remember are the following points so I can take something from this grow and move on with a little more knowledge:
1. the need to insulate the grow tank from the tiled floor
2. in extreme temps when using a recycling system the need to take more care of my rez temps
3. in extreme temps to consider the use of a water chiller
4. recognise the symptoms at a earler stage and be more prompt with my diagnosis
5. what a bastard pythium can be when it takes a toe hold in a hydroponic system
ok this is what I'm going to do now AND PLEASE JUMP IN IF YOU THINK I'VE GOT IT WRONG OR THERE ARE THINGS I'VE MISSED!
> add h2o2 to the system at the dilution rate of 0.5 % of H2o2(17.5%)v 50 mil per hundred L of solution
> insulate the tank with 25 mm polysterene sheeting to protect from the tiled floor .. hell i insulated last winter to protect from the cold .. it makes sense ..
> add bottles of iced water to the rez to try and reduce the temp
> cross my fingers and hope for a miracle
> save up for a water chiller for next year?
> consider sticking with coco-perlite during the summer months?
> accept the fact that I am going to have a substandard grow......however something is better than nothing
>reduce the ec
>foliar feed for a week
if anyone has any suggestions then please pipe up I could do with it!
cheers
LBP
