Need help, don’t know what’s happening

H 55%
Temp 26c
1 month old
Ph water 6.6

Looks like underfed/lockout, but your newest growth looks good.... I would give them straight water and see if the new nodes keep growing out that green, and then start feeding them again. Old leaves yellow and die and sort of look fucked up a pot of the time, and if you don’t feed them enough/get them enough nutrients, it happens way faster.

Also the way they’re stacking/growing looks like they’re revegging or something like ph is fucked.

Looks like nitrogen or potassium deficiency to me. Would just give it plan water at right ph

You haven't given enough info for a real diagnosis,any other advice is only a guess.And bad advice at that!That is starving to death.

The new growth looks to be green. However it is yellowing at the edges like the old growth.

I’d say feed that thing