Serious Problem - Plants Not Growing

[ChenBenTz]

So, I have a serious problem with my little clones.

They're about three weeks old (and another batch is one week old), but they're still tiny.

They're also yellowing and some of them are outright dying.

I've fed them Lucas and 20-20-20. I've given them magnesium, but nothing can explain this.

I think it has something to do with the roots, because when I water them they fall down, like the roots haven't taken ground or haven't become strong enough.

I've checked for root rot and aphids but there's none of that.

I simply can't figure out what is wrong with these plants.. they're usually a little yellow when planted, but these guys are just dying..

pH is always 6.5-6.8, AFAIK. I'll be buying a second pH pen to confirm.

Temps are 23-28C. 24/0.

Thanks!roll

 

[Vanilla Phoenix]

Go with your first instinct....soil looks too compact from what I can see

 

[DrFever]

dude obviously you either frying them your ph could very well be out
i suggest you re transplant them into smaller containers go get some organic blend soil buy some worm casting add it and just water until they recover

 

[Waterlab420]

Yea def looks like a PH issue. Try plain water like previously stated above. High humidity.

 

[zerocool21]

a second ph pen isnt going to help you, its just best to get a calibration solution to verify its correct, what ec are you feeding and what ec is coming out. id bet that is where your issue is. the ph could be it but without knowing its correct its just an unknown.

they really dont need 24 0 of light a 18 6 or 20 4 is better imo as it does give them a resting period. also what medium (s) are you using.