Plant has gone completely yellow

[Cannabis 420]

Both were recovering from bad set up at the beginning and they both still growing but my Hunter Money maker has turned light yellow , Is this because nitrogen deficiency?Light Bleach?
-Soil
-Ph 6.5
-1 Month and 1 week old
- fed 2 times. ( Hydroponic Flora series)
- Humidity is low , how can I keep it at 30%-40%???
- Temp 78
-600 watt Hps 2 feet from them.

Hunter Money maker (yellow leaves)

Lemon kush doing Better

 

[Dan Ultra]

Diggin the HUF socks

For humidty you can hang a wet towel partially soaked in a bowl of water. That will help to raise the humidity quite a bit.

 

[Stealthboat]

Try to get the light closer if you can. The angle is hard to see but I think they are overwatered, and they might need some more nitrogen in their diet. The ideal ph for soil is 6.8 also

 

[Fuzzy Duck]

Mmm looks like ya had a little nutrient burn on one of em (bottom pic) & by the looks of things ya trimmed of the damaged leaf tips !

You also mentioned this...

- fed 2 times. ( Hydroponic Flora series)

I'm just going to make some assumptions on this... correct me if i am wrong ?

Nutrients used could well be for hydroponic water based systems aka growing in water, where these nutrients PH corrected when applied to soil of the plants ?

If they where PH corrected, well hydro nutrients are a different PH value from soil nutrients slightly, ye a bit of difference between the 2 methods to be honest.

You might of acciddently caused a PH imbalance which might of created nutrient lock out problem in the short term ?

A flush might be required... that is for example a pot size 1 liter requires 3 liters of water to perform a flush, basically 3 x water than that of pot size poured through it !

A flush basically leaches out excess nutrients built up in soil etc & should restore things back to the way it should be in theory...