Can someone please help me out

I’m a newbie 18 days in and I’m not sure what’s going on with this plant. The others are fine.

Please provide every detail you can.
I'd say magnesium deficiency with the information given.

smokinrav said:

Please provide every detail you can.
I'd say magnesium deficiency with the information given.

Click to expand...

That's not Mg deficiency.

It’s a 4 plant 3 gal reservoir . Today is day 18 . When I started out I didn’t have a ph meter but this didn’t happen until few days ago. That plant was the biggest for the first 10-12 days now it’s 2nd biggest. I use the advance nutrient line. Mars hydro lights. Temps avg 80 humidity 40-45

Meh, I was guessing.

looks like P to me

wouldnt do much about it with them being that small

shit happens .

What did you do the day before this started?My guess is ph too low.

Haven’t done anything different