Nute Burn Or Deficiency?

I noticed a few days ago that the tips of a some leaves where beginning to turn yellow. This was just after I upped the nutrient level so I thought it must be first signs of nute burn.

For the next feed I gave them pure water but some new growth still seems to have same problem, this is mainly only on the new growth towards the top of the plant.

Am I right in thinking this is very light nute burn or is it somehow a deficiency?

Nice one .

Looks like broad mites.

yea, either broad mites, or too much N

N excess

Thanks for quick replys guys. Im thinking its probably too much N as it happend when i had upped my nutrient levels.

They are due a feed today, would i be better using pure water again or just half strength nutes.

Thanks

just water....

Nice one mate

It's been 2 weeks now and I haven't seen any improvements.

I fed them with just water for two feeds and then started with half strength nutes but I'm still seeing the same yellowing tips.

Some older leaves are showing signs of what looks like N def to me but I'm not sure.

Any ideas guys?