Crispy golden-brown leaves and no smell

Strain - Sativa/Indica Cheese, Sativa Grapefruit Diesel, Indica Purple Kush
# of Plants - 2 Each
Grow Type - Hydro
Grow Stage - Flower, 8 weeks
Setup - Hand water from gallon jugs
Light - 600 Watt HPS
Nutrients - General Hydronponics Flora Nova, Calmag, Koolbloom, Sweet
Medium - Cocogrow coir fiber
PPM - Unknown, following genhydro schedule
PH - 5.8, recently changed to 5.5 to try to fix problem
RH - 40% to 55%
Room Temperature - 78 to 88
Solution Temperature -70 to 75
Room Square Footage - 27
Pests - None Known

Hey, nice to meet you. I'm a new first time grower and I'm having a problem in late bud. The leaves are turning a into crispy golden-brown mess, with the tips starting first and curling under, then the margins. The Cheese unfortunately have got it the worst and they are the largest.



I've been pruning them as they get bad, so I don't know if it will kill the whole leaf or not. It's the first problem I've had, but thanks to the dead reckoner at 420mag I suspect it might be K or Manganese.



I mix 12 one gallon jugs and hand water with a measuring cup twice to three times a day, until water barely seeps from the drain holes. I lowered the ph from 5.8-6.0 to 5.5 to avoid K lock, and I removed the dry Koolbloom and raised the lights to reduce stress. The leaves feel dry, and the crystals on the leaves seem to have fallen off. The buds seem stunted and don't reek like they used to. I've put many hours into this and I don't want to see my babies turn to ragweed!

dont worry. thats what happens towards the end of flower. i started to worrie my first grow. they look fine.

dmn0712 said:

dont worry. thats what happens towards the end of flower. i started to worrie my first grow. they look fine.

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They don"t look "fine". Thats what happenes towards the end of flower....when you're not doing it right. They should not be like that. You've got a nutient imbalance. Too much of one thing and/or not enough of another. An Mg, K, or P def is likely. But you said you give them calmag so you should have plenty of Mg.
I think you need a PPM meter for soiless growing to solve this.
Dont prune the leaves! The plant can take energy and nutrients from those leaves until they are completely toasted. When you prune them off you're stealing from the plant and worsening the situation.
I wish i could help you more but I only do soil.