New Grower Help guys unknown deficiency

[irishganjafarmer]

I'm growing 2 fast 2 vast into week 7 and I'm starting to get worried I've attached pics to show you guys but basically it started when I was without a ph meter so I thought it was ph lock out I flushed at the time and it help but the damaged leaves never repaired
I've switched to bloom nutes yesterday from grow both biobizz I started it out on 2.5 ml to 4 litres of water is that too much? When I checked her today I see those dreaded brown spots creeping up to newer leaves now any help you guys could give is appreciated

 

[F.N.]

I am not 100% but it looks like a cal mag deficiency but wait until someone else chimes in. Ask in the live help section too. But I am leaning towards CM problem with the spots showing like that

 

[namvet25]

I'ts not uncommon for some bottom leaves to turn yellow and dry up.Once a leaf is damaged it won't repair itself so just remove all the affected leaves.Have you been using cal/mag?Post a pic of the entire plant and list the nutes and ther npk numbers that you have been using and dosages.Do you have a ph tester now?

 

[pop22]

I'm growing 2 fast 2 vast into week 7 and I'm starting to get worried I've attached pics to show you guys but basically it started when I was without a ph meter so I thought it was ph lock out I flushed at the time and it help but the damaged leaves never repaired
I've switched to bloom nutes yesterday from grow both biobizz I started it out on 2.5 ml to 4 litres of water is that too much? When I checked her today I see those dreaded brown spots creeping up to newer leaves now any help you guys could give is appreciatedView attachment 444744View attachment 444745View attachment 444746View attachment 444747View attachment 444748View attachment 444749View attachment 444750

How wet is your soil? It looks like root rot from over watering to me:

http://www.growweedeasy.com/overwatering

 

[irishganjafarmer]

I'ts not uncommon for some bottom leaves to turn yellow and dry up.Once a leaf is damaged it won't repair itself so just remove all the affected leaves.Have you been using cal/mag?Post a pic of the entire plant and list the nutes and ther npk numbers that you have been using and dosages.Do you have a ph tester now?

I haven't been using cal/mag but considering getting epsom salts for it these problems did start when I installed led aswell I hear they cause same defs

 

[irishganjafarmer]

And yeah I have a ph tester now mh ph80 with ph up and down setting it to 6.7 runoff 6.5

 

[namvet25]

You should be using cal/mag,Epsom salt is only good for mag def.

 

[irishganjafarmer]

So don't bother with the salts?? I was thinking of flushing her tonight even though I only fed her yesterday to stop progress or will this help

 

[Anasazi]

I think epsom salt is dirt cheap and good to have but you need calmag.

 

[pop22]

Calcium moves relatively slowly through the plant (it is a semi-mobile nutrient), which means it tends to "stay put" after it's been given to a leaf.
Because of this, calcium deficiencies tend to show up in newer growth (upper leaves) and middle vegetative growth.

Its more likely to be a Potasium deficiency by taking a closer look at those leaves:

http://www.growweedeasy.com/potassium-deficiency-cannabis