Magnesium deficiency?

One of my four plants started showing some yellowing tips and a few spots on the leaves. Mg deficient or nute burn?
Grown in a 7 gal pot w/ soilless medium. Just watered/fed two days ago. I use two part nutes with ph’d tap water. Soft water without much cal or mg. But the nutes should have enough, 175ppm cal and 36ppm mg. Ph was at 6.2. Runoff at 6.4

I just mixed up a tsp of Epsom salts in a 1/2 litre of water to the soil in case it’s the issue. I just watered it so I didn’t want to add too much more.

Are you using led, Hps, t5?

Skewbong said:

Are you using led, Hps, t5?

Click to expand...

600w MH

For reference. It’s the White widow plant in the front left, sitting lower from the light then the two crit mass plants in the scrog. The front right is a BB AK.

Yeah. I’m thinking I may be hitting the nute limit. Since the yellowing tips is on the new growth. Found another thread that seems to point to over feeding.

Thought maybe light bleaching, maybe you're right. Not my place,good luck on this.