Please help! Brown spots and dry dying leaves

[Majorduke]

This girl is in her third week from seed. I am doing a deep water culture with cyco nutrients. It is a jock horror autoflower running on 24 hour photo. With 300 watt LED. Room temperature 77 degrees humidity 25% water temperature 70 degrees pH 5.5 ppm 300. This is the third set of leaves that have developed these around spotty patches and then the leaves dry and seem to die. My original nutrient solution was too hot over 500 so I flushed it and completely readjusted my nutrient solution down to 300 ppm. This was 3 days ago and haven't really seen any significant changes so far. Here are some pics any information would greatly be appreciated. Here are some pics so maybe somebody can help me identify what's going on here thank you

 

[Manclook]

My guess is problem with roots. But I may be wrong.

 

[Majorduke]

My guess is problem with roots. But I may be wrong.

Roots seem to be strong, they are clean and white. Once they came through the basket they really seem to be taking off. And the growth in the plant seems to be great

 

[Crab Pot]

It would help a lot if you would post pics with the LED's turned off but, it looks like you have pest damage. Have you noticed any pests? Can you post another pic of the under side of the leafs?

 

[Majorduke]

No signs of pets of any kind so far. Here are some more pictures for you

 

[Igotthe6]

Get yourself a spray bottle use 1 teaspoon a gal Epsom salts to foliar feed. It looks like a mg def.What are you using for water/nutes.

 

[Majorduke]

Distilled water 3ppm and I'm using equal parts cyco grow A & Grow B

 

[Majorduke]

Get yourself a spray bottle use 1 teaspoon a gal Epsom salts to foliar feed. It looks like a mg def.What are you using for water/nutes.

Distilled water 3ppm and I'm using equal parts cyco grow A & Grow B

 

[makka]

whats your ec ? i suspect burn here

 

[Crab Pot]

News pics are a big help. I agree with Igotthe regarding the mag def. and they do look burned. Have you been using cal/mag?

 

[Majorduke]

whats your ec ? i suspect burn here

It's right at 300 ppm now. At first I mixed it to the manufacturer's recommendations but was way too hot and I have since flushed it and reworked my bites to 300 ppm. Burn is what I suspected too that's why I flushed it a couple days ago. Maybe I should just give it a couple more days and see if it gets better after the flush

 

[Corso312]

Did you wash that hydroton good before use?

 

[Igotthe6]

Your problem is pretty basic. It is def in mag,probably Ca. too. When using distilled or r/o water a calcium and magnesium supplement is a must with most nutes.

 

[Majorduke]

Absolutely, washed really well in a strainer under a sprayer for about 15 minutes

 

[makka]

It's right at 300 ppm now. At first I mixed it to the manufacturer's recommendations but was way too hot and I have since flushed it and reworked my bites to 300 ppm. Burn is what I suspected too that's why I flushed it a couple days ago. Maybe I should just give it a couple more days and see if it gets better after the flush

yeah u got it man its just burnt and the damage leafs wont recover just keep an eye on ppm untill new growth looks nice it already looks like its recovering to me on the new growth

 

[Majorduke]

Your problem is pretty basic. It is def in mag,probably Ca. too. When using distilled or r/o water a calcium and magnesium supplement is a must with most nutes.

 

[Majorduke]

Man if that's it sounds like a pretty easy solution to this problem. I can get some calcium and magnesium at the hydro store, my only question is how to know how much to add to my solution to make it right

 

[Igotthe6]

if you get gh calmag,run at 50% what they recommend.The Epsom salts will speed it along.

 

[Alexander Supertramp]

Did you wash that hydroton good before use?

Just what I was going to ask.

 

[Majorduke]

Just what I was going to ask.

Washed the hydroton very well in a strainer. Washed and worked it for about15 min