Mag problem?

[Headsmcgee1]

Canna coco 7 gallon pot

What STRAIN are you growing? Vortex
What was the establishing technique? (Were the seed or clone?) Clone
What is the age of your plants? almost 3 months
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? 20 days into flower
What Technique are you using? handwatered coco pots
What substrate/medium are you using?(Hydroton, RockWool etc.) mostly coco some perlite
What is the Nutrient temperature? 18.6 C
What Nutrient's are you using? Canna A&B Rhizotonic Cannazyme Boost
What is the TDS/EC/PPM you are using? 920 ish
What is the pH of the "Tank"? 6.0
Are you sure your calibration is correct on your equiptment? yes
When was your last watering? 3 days ago
When was your last feeding change? (ie. grow-bloom-micro-additional). Added boost a couple days ago
What size bulb are you using? 1000w hps
What is the distance to the canopy? 10 in or less
What is your RH Factor?
What is the canopy temperature? 78
What is the Day/Night Temp? (Include flucutaion range) 85 to 65
What is the current Air Flow? (cfm etc.) 455 cfm extake and intake. 3 oscillating ans
Is the fan blowing directly at plants? yes
Is your water HARD or SOFT? 100 ppm
Has plant been recently pruned, cloned off of or pinched.? pinched when the top bud was touching the light
Have any pest chemicals been used? If so, What and When? Organicide a week ago
Are plant's infected with pest's? nope

Plant started to yellow up a little and the ridges were folding up. (Not as severe as in the first picture.) I decided to foliar with sea-mag (Humboldt Nutrients). The leaf ridges ended up folding up even more (picture 1).

 

[grapeman]

looks more like heat stress to me.

Move your lights 24" to 30" away for a few days. 1000w should be between 18" (ideal conditions) and 24" from the canopy.

Not many of us have ideal conditions all the time.

 

[Johnny Rotten]

Does look like heat stress....

What's up with the watering every three days? You should treat coco like coco and never let it dry out. Unless your plants are tiny, even with 7 gal containers they need to be watered/fed daily or every other day at the most.

 

[nbm]

when you see the leaf is curling up this far its deff also a heat problem, it means the plant cant get breath properly and curls up to get rid of the heat.
leaf fringe standing up point up mean the leaf is trying to dissipate as much moisture as possible but it is unable to. this could be caused by toxic salt buildup, lack of water , or as above heat stress.

 

[grapeman]

He states in his list above that he has his 1000w light 10" from the canopy.

HEAT.

 

[NipponFreak]

Heat + some mg wouldn't hurt with the coco.

I know it's a popular thing to hang your lights very low but here's a secret. Pros don't.

 

[Headsmcgee1]

Hey guys got lazy and copy pasted my info from another forum. This plant is actually over 2 feet away from the light. So i am going to eliminate heat stress for the equation. Could it be a mag overdose?

 

[Budmentor]

Could be the plants are at the verge of nute burn. I would flush with pH adjusted water and move the lights to 3 feet above the nearest top for a few days. If the new growth is normal lower lights back to 24 inches.