What's causing this?

[Smalls420]

Hey everyone! So I'm trying hydroponics with one of my clones and the bottom of the plant looks like this and the tips of the leaves are turning up and are practically dead. This is my first hydro run here are the details.
Strain- Pineapple Express
Light- 600w led about 20 inches above plant
Temp- 74°F with RH around 45%
Ph- 6.5
Nutes- sensi grow part a and b with CalMag I have been adding 5ml of each once a week
Km using a 5 gal bucket with two 5 inch bubble stones for aeration it has been 2 weeks since I put the clone in the bucket. Thank you in advance for your help!

 

[Old Salt]

What do the roots look like?
What is your substrate?

 

[Smalls420]

What do the roots look like?
What is your substrate?

The roots look healthy and white and I'm using peat moss

 

[Old Salt]

I'm calling @Chris Scorpio as I'm not using your brand of nutrients, and grow drain to waste.

 

[PE636]

Ph 6.5 is way too high. I'm thinking .. Chris will hopefully be along to verify as I also do dtw. I think you need to be more like 5.8 maybe bit less.

 

[BeanTownFan420]

That looks fungal to me.

 

[Smalls420]

Ph 6.5 is way too high. I'm thinking .. Chris will hopefully be along to verify as I also do dtw. I think you need to be more like 5.8 maybe bit less.

Ok thanks for your help hopefully he will be able to give some insight

 

[BeanTownFan420]

Could be mildew and no its not powdery mildew its black or dark look under leaves closely.

 

[Chris Scorpio]

pH is way high....try 5.8-6

Has it been two weeks since it had fresh water as well

I'd suggest max at half strength nutes, add full strength calmag and get an enzyme cleaner like hydroguard or z7, I use both

Also a pic of the roots, full plant and buckets always helps

 

[Chris Scorpio]

What is the medium in yer net pots??

How far below the net pot is the water at

 

[Smalls420]

What is the medium in yer net pots??

How far below the net pot is the water at

I'm using peat moss and I'm keeping the water just touching the medium I'll try dropping the ph and give it a water change

 

[Chris Scorpio]

Peat moss, sounds a bit obscure, but ok

Drop the water below the net pot about 2"

Is the peat wet, soaking??

 

[Smalls420]

Yeah this was just a thrown together experiment I was doing Haha. But the moss is damp and ok I'll do that as well thank you!

 

[Smalls420]

Alright so I changed the water added half strength nutes with full strength CalMag and dropped the water level a few inches as well as adjusted the ph to 5.8 here are pics of the roots and the full plant