deficiency?

[Blackberrykush]

Need a bit of help identifying this problem and how to correct it..

All old growth is green but the new growth is yellow.. I know new growth generally is yellow but this isn't getting any better as the days go by...

Growing in DWC, GH nutes 0.6 ec, background ec is 0 because I use RODI water, although yesterday was the first full res change with it but the week before I had to use mineral water from asda... temps don't get above 29 lights on lights off around 20

Cheers



cheers

[chufuginlookinat]

Does look bad at all mate. Got a side on shot?

Can be the temp is a bit high as the edges are starting to curl.

I would try and lower the average temp as you can have a 9 degree jump between on and off.

[Blackberrykush]

Cheers

I've come from work and they are looking better... could do with an oscillating fan rather than the fixed one I have..

[chufuginlookinat]

Yeah man get a big arse fan blowing on her

[Blackberrykush]

Just hada play about the little fan is doing a better job

[Cuntychops]

It`s not wind burn and it looks a bit more like magnesium deficiency. But younger leaves tend to be paler and they will green up with age, it`s the bigger fans that are pale makes me think more magnesium deficient, upping your ferts a wee bit may help or Epsom Salts, magnesium gets locked out at PH below 5.8.

[Blackberrykush]

Looking a shit ton better since yesterday all nice and dark green curl has almost gone completely ill put a pic up on my grow thread shortly