Calcium deficiency vs Septoria? Or something else?

[joebe1]

I first noticed the discoloration in the leaves yesterday but left it and it's gotten worse over night. After some research into what it may be I thought the two candidates that look most similar are Septoria or Calcium deficiency, but I'm very new to indoor growing and would love a second opinion. Any ideas are greatly appreciated!

The strain is Cherry Grapefruit and It's only in the first week of growth. The humidity ranges from about 70-80% and temp ranges between 21-27 celcius.

As its still very early I haven't added any nutrients, could this be the issue?

 

[emanresu]

calcium deficiency may be the issue, depending on what soil you planted them in it's not leaf septoria for sure.

 

[Gmix]

What medium are you using
Have you feed them anything
How close is the light , what wattage is it & is it dimmed

 

[Kamisama]

Do u have correct PH?

 

[joebe1]

What medium are you using
Have you feed them anything
How close is the light , what wattage is it & is it dimmed

Im just using organic potting soil mixed with some perlite.
I haven't fed them anything yet, but I've got some CalMag arriving tomorrow as I'm thinking this could be the issue?

The light is 600W set at about 50% brightness and its about 30-40cm away from the plants

 

[joebe1]

Do u have correct PH?

PH is 7

 

[Gmix]

Im just using organic potting soil mixed with some perlite.
I haven't fed them anything yet, but I've got some CalMag arriving tomorrow as I'm thinking this could be the issue?

The light is 600W set at about 50% brightness and its about 30-40cm away from the plants

Ah right
The lights to close
Raise it to around 25-36”

Don’t add cali mg or food your plants to young and doesn’t need it not in soil

Btw you don’t need to ph organic grows that’s the one benefit I love about organics as I loathe measuring out stuff

 

[Oldchucky]

Is that 600 Tru watts pulled from the wall or 600 claimed watts from a misleading manufacturer? A true, 600 W pulled from the wall light is an expensive piece of an equipment! Probably about a buck a watt! There is a big difference between the two! So be careful!

 

[joebe1]

Is that 600 Tru watts pulled from the wall or 600 claimed watts from a misleading manufacturer?

I have no clue, probably the latter tbh.

This is the product on amazon:

Amazon.co.uk

 

[joebe1]

Ah right
The lights to close
Raise it to around 25-36”

Don’t add cali mg or food your plants to young and doesn’t need it not in soil

Btw you don’t need to ph organic grows that’s the one benefit I love about organics as I loathe measuring out stuff

Thanks for the advice, I've moved the lights further away but clearly some damage has already been done.

Hopefully still recoverable from here :)

 

[Oldchucky]

65 watts from the wall! Make sure people know this when you ask for advice! Should work for seedlings though! I just hate seeing people thinking they are getting a deal when they are getting conned! You’ll do all right!