Is this leaf septoria? Or is it from over watering

[Aaflexy]

I had overwatered a little in the beginning and that’s how I feel the lower growth had gotten the the brown tips but I’ve been careful with watering ever since then and some of my new growth has tiny spots on it and ignore the whitish residue irs from the amendments I put on last night for the possible potassium deficiency Im growing in coco and ph my water to 6.2 to 6.8

 

[mysticepipedon]

It's not septoria.

 

[growsince79]

Light stress?

 

[Aaflexy]

I thought it was light stress at first too but So I dimmed my lights by half and then after that the new growth started getting a bit of yellowing around the edges so I went into the assumption it was a nutrient deficiency

 

[LexLuthor]

If you want accurate help, can you give more information? Lights, pot size, media, nutrients, strength of nutrients, temps, RH, etc.

 

[Aaflexy]

I grow with organic dry amendments (earth dust nutrients) my light is the Mars ts3000 I’m growing in a 3 gallon fabric pot and my temp stays 74-78 with lights on and 68-69 with lights off and my humidity before watering is 48 percent but after I water it gets as high as 63% and then goes to 58 percent for a couple days but when I have to water again it drops down to the 48 percent

 

[Aaflexy]

my medium is just straight coco with perlite and the brand is Mother Earth