A little help please

[Pure]

K well I am having a few issues could you guys have a look at the pics and tell me what ya think I have been to various sites to narrow it down a bit and belive I have but I would like to know what other people think I

belive I am suffering from a ph fluctuation problem in one of my plants and the other one looks to be a deficiency of some sort I think it is sulfur, potasium or nitrogen, I have been using just straight tap water up untill yesterday so it could just be they where lacking needed nutes when just being fed with tap water

 

The fact I was only using tap water till yesterday mnakes me 100% certain that it's not overfertilisation anyways have a look and let me know what ya thinks

[Pure]

the same plant with a few shots

[Pure]

and the last one

 

This one is the one I belive could be a ph fluctuation but could be a deficiency because of the symptoms as well , it starts off as a few dots and then the leafs curl up like in the picture and then they become crumbly

[F420]

my guess is the top ones are- Nutrient deficiency which I get from the fact that you have Purple stalks, and yellowing.

 

yellowing can be from excess light, or Nutrients.

 

bottom ones look like Ph fluctuations , with some nutrient problems.

 

I would lift the light a bit, flush the hell outta them and start on 1/4 strength nutes.

[Pure]

no worries will do thanx for the confermations and tips

 

 

does it need a major flush considering I have only been using nutes the last two days

[Pure]

there we go all flushed I have also removed the leafs that are too far gone on the PH fluctuated plant

 

 

Will green come back to the yellow part of the leaf that is suffering from a nute deficiency ?

[EMP]

and the last one 

 

This one is the one I belive could be a ph fluctuation but could be a deficiency because of the symptoms as well  , it starts off as a few dots and then the leafs curl up like  in the picture and then they become crumbly

thats the same problem im having at the moment, and then the leaves become brittle and fall apart.

 

ive been watering them with monitored ph water so in my case its not a ph level problem, but like you sugested it would more then likley be a nute deficiency.

 

i gave my plants a little flush and now started watering them with a 1/2 nute strength (well im using thrive so i dunno if you could call that a nutriant). 1/2 is prolly a bit strong but i'll top up the watering tub soon to dillute it a bit.

 

I'll attach an image aswell, started getting droopy, then these spots appeard, next it went yellowish and brittle. all in about 3 days.