I wouldn’t add any sugar how high are your leds just to clarify
Led’s are a fickle thing and you are running a recirculating system the tallest plant getting burnt wouldn’t see odd but how do you feed just one? Also if you since moved light the plant still takes time to show damaged area’s so may already be fixed just only seeing resulting damage now? Like I said you could feed but keep ppm super low since even seedlings would be in it. And most people keep good Leds close to 3ft away the Hydro shop I go to the owner and most I talk to there say closer than a meter they can bleach with high wattage ones.
if I am the only one seeing those spots on the lid let me know I will quit smoking in the am? those are just the ones visible to your camera atm just food for thought
@Donaldj and @Majiktoker
The higher powered 350-360w actual led is 55inches!! from the top of the leaves, the other one is about a foot less, and that side of the tent hasn’t encountered any problems what so ever. This plant was the king, but now is neck and neck with 2 others.
I just had a proper in detail inspection of her, she smells! had a proper delicious, strong wiff of cannabis.
Anyway, 2 of her leaves at the bottom are starting to yellow from the inside of the leaf next to the spine, so i have to say i think it may be a deficiency? all i have is cal mag though.
No no donald, the damage was done, trying to remedy it now, and see if the seedling is happy over where she now is after switching places.
This LED does have magnified lenses, for penetration, but still… i cant imagine it doing that much damage to one plant.
I can feed just one because the system is a ridiculously slow assed piece of garbage basically, but i now realise i have a dripper system to add to the head bucket - which will then push the water into the tops from head, and out the bottom and back into the head - so the system may kick ass! we will see.
You cannot just feed one on a RDWC system. Even if it is slow, it is still integrating anythin you put in one bucket into all the buckets and in the resivioir.
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I can see the spots but leds reflect alot due to the intensity of the light
@McLovin777, white tips ore white streaks in leaves is a zinc deficiency
buying some zinc stuff, il use 1/5 of the dosage it says and then it can top all the other plants up to.
cheers maj
Keep me posted buddy cheers
Hey bro, im struggling to find a zinc nutrient… cant seem to find one! Are they called something weird or what? Lol if you can advise me on what you have - awesome
I found this online
I don’t know anything about this product or where to buy it in your part of the world. You most probably can to an Internet command at their Web site.
~Al 
Vitamin b1 bro
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Much more simplier, lol, @Majiktoker 
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Lol yup and simple to use 
and some thing I have experience with lol
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Thanks aNyway dude 
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No trouble dude, it’s just another option
Cyco B1 Boost combines a healthy dose of NPK nutrients with plant-health boosting vitamin B1 (thiamine). It provides vital nutrition and acts as a tonic for your plants that will make them more resistant to stress. Use it alongside your base nutrients and additives right the way through the grow, from veg to flower.
Contains a source of NPK nutrients and thiamine
Pharmaceutical grade ingredients
Reduces the risk of transplant shock
Enhances the development and success rates of your cuttings
Promotes the development of healthy roots
Relieves stress caused by pests or the environment
Promotes vibrant, healthy growth
Highly effective in any growing medium or system
Used alongside your base nutrient, right the way through veg and flower
Added at 2.0ml per litre of nutrient solution
STILL CANT FIND IT! its madness, how is it so difficult to find a nutrient for a common plant problem!
Just look up vitamin b1 man
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