anyone knom wat def. this is

im using boibizz all mix, bio grow

1ml to litre of water ph 7

400w hps

i tough it was nute burn so i flushed..

could it be a def. ?

nitrogen deficiency

any ideas on how 2 fix it

add nitrogen!! but ask yourself how could it be nitrogen DEF? 1 lack of, 2 a ph lock up? so my next question is!!! whats you PH at? and whats the
PH of your run off?

the ph was at 7. when i frist seen prob i changed water to 6.2 .. have no ph pen yet so dont knw the run off...could it be magnesium def. cos i tough red stems was a a way of knoin that its nitrogen def.

not allways, do you have a ph dropper kit the cheap $5 kit?

no i havnt mate going to get the pen 2morow..

No... no. no.

Not nitrogen deficiency. JFC. It's like "if it's yellow it must be N def..." Wrong Muffy. So wrong.

Dude. That is known as nutrient toxicity.
You have too much nitrogen. The dark, dark green leaves and hooking of the edges indicates this. It also indicates a phosphorus deficiency as a result of ratio imbalance. Hence, more phosphorus is not the answer.

Flush the media at 6.5pH and begin using less of whatever nutrients you are on. If you can include a bit more Phosphorus (but less nutrients overall) then your plants will recover fine. I'm talking very slight changes in your nutrient profile. If this isn't possible then just use less stuff man.

Plants are not like animals. You cannot just throw food at them and expect them to eat it. This is all about uptake, which depends on osmosis, which is chemistry. When the elements in the chemistry are out of whak then the plant reacts.

thanks man.. i flushed alreay and have brought the nutes down to half ml to 2 litres of water.. is ther anything else i should be doing?