Need some help with a sick plant!!

[Fubard]

Thanks guys been a massive help I’ll let yous know the outcome

If I'm right about the air movement, cut the affected leaves off PLUS those nearby as no improvement in airflow will stop the spread of spores. After then the increased air movement will stop the problem coming back.

The fact that the affected plant is so far from your intake, extract and fans and in a corner tells me dead air, and therefore increased humidity locally, is an issue. Get that sorted out.

 

[Roger A. Shrubber]

since you finally posted in the right forum....
those are calcium deficiency freckles. i don't advocate the mindless use of cal-mag, but this is a case where i think that's exactly what you need.
in the future when you have a problem, you'll get good useful answers a lot quicker if you tell people what kind of medium you're growing in, what kind of lights you're using, what kind of nutrients you're using, the temps, Rh, ph, and include a couple of pics of the effected plant, one of the problem, and one of the whole plant, so we can see where its starting, which makes a difference. (look up mobile and immobile nutrients)

 

[Leesmith12345]

since you finally posted in the right forum....
those are calcium deficiency freckles. i don't advocate the mindless use of cal-mag, but this is a case where i think that's exactly what you need.
in the future when you have a problem, you'll get good useful answers a lot quicker if you tell people what kind of medium you're growing in, what kind of lights you're using, what kind of nutrients you're using, the temps, Rh, ph, and include a couple of pics of the effected plant, one of the problem, and one of the whole plant, so we can see where its starting, which makes a difference. (look up mobile and immobile nutrients)

I tested the run off last night and it was sitting at 5.5 but going in at 6.5 obviously the plants we have nute lockout managed to get it up to 6 after 100 litres of ph6.7 water thanks again boys

 

[Roger A. Shrubber]

i've grown outside since the mid 80s, and inside for a little more than 3 years now. i've never once checked run off ph. it's a non issue. soil buffers itself. as long as you ph your feed going in to the proper range, it will be the right range in the pot. run off has been "processed" by the plant, it's had nutrients extracted from it, which changes the ph, and waste products added to it, which changes the ph more...
don't worry about run off ph, and DON"T run a lot of water through your pots trying to fix something that's not wrong to begin with

 

[Beachwalker]

i've grown outside since the mid 80s, and inside for a little more than 3 years now. i've never once checked run off ph. it's a non issue. soil buffers itself. as long as you ph your feed going in to the proper range, it will be the right range in the pot. run off has been "processed" by the plant, it's had nutrients extracted from it, which changes the ph, and waste products added to it, which changes the ph more...
don't worry about run off ph, and DON"T run a lot of water through your pots trying to fix something that's not wrong to begin with

I would suggest runoff pH is valuable at certain times. It's more of an indicator of salt build-up, among other issues, at least in my opinion.

I check maybe once, if that in veg, and probably twice all together in flower, or if I see the plant having an issue.

 

[Roger A. Shrubber]

I would suggest runoff pH is valuable at certain times. It's more of an indicator of salt build-up, among other issues, at least in my opinion.

I check maybe once, if that in veg, and probably twice all together in flower, or if I see the plant having an issue.

if you learn what it means, it can be a diagnostic tool. i think most people have no idea what the numbers mean to begin with, and no idea what to do about them. they just read a number off a chart and try to match it. which actually keeps most of them out of deeper trouble, to begin with

 

[propertyoftheUS]

Man y'all sure that ain't mites???

 

[Roger A. Shrubber]

don't look like mites to me, mites make little white spots, they don't get rusty looking