Is this cal-mag problem?

Ph at 7 is neutral. That's how it comes out of my sink. I didn't adjust the ph. I tested the runoff of the pots and it comes out at 6.5. The soil has perlite in it and drains very well. The roots are quite extensive for one gallon pot but the plant is still looking and growing like shit. Should have said half are super skunk and half are rqs critical.

Kcrop said:

Ph at 7 is neutral. That's how it comes out of my sink. I didn't adjust the ph. I tested the runoff of the pots and it comes out at 6.5. The soil has perlite in it and drains very well. The roots are quite extensive for one gallon pot but the plant is still looking and growing like shit. Should have said half are super skunk and half are rqs critical.

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I knew it (that's why I asked) and that is why I believe you have the lockout; make that adjustment to 6.5 and see if it doesn't take care of the problem, good luck!

Kcrop said:

I did what you said already. I have not been feeding either. Some of them have come back but this one and a few others still have no change. They have red stems and stopped growing. Not sure what the problem is.

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So what it sounds like is the rest also suffered from something you did a while back and are recovering.
Probably overdosed with nutes right?
Now the other plants are bouncing back and this one is not as strong as the others.
If that's the case it is not unusual for some to handle the damage better than others.

Do you have a TDS meter?
Can you take pictures of the other plants?
What brand and model are your 300w led light?

I'm having similar problems can anyone look at my recent post to help out please?

I have never fed the plants. No need to being that they are in new soil. I do not have a tds meter and the lights are mars hydro 300w. Only like 180 actual watt usage. I have used this exact setup for 4 years with no problem. If they don't recover I can always start over.

Kcrop said:

I have never fed the plants. No need to being that they are in new soil. I do not have a tds meter and the lights are mars hydro 300w. Only like 180 actual watt usage. I have used this exact setup for 4 years with no problem. If they don't recover I can always start over.

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My bad. I was confused by post 2 and 3.
Thought you meant you were feeding them then stopped.
A tds meter is a handy tool many growers have, here is some info if interested.
https://www.growweedeasy.com/ppm
Good Luck!