Older leaves yellowing with brown spots appeared. Curling edges

Hey guys on my second grow here and decided to do a different technique, hempy bucket perlite scrog monster (thats the plan anyway)
Growth overall seems slower than last time although i cant properly confirm this.

Few days ago the older leaves started turning yellow and a bit dry
now as you can see from the pictures below they have developed brown spots.
New foliage is green and luscious but, some what cabbagey and curling up.
Ive done a bit of homework and it looks like it could be a magnesium defficiancy?
My ph has been around 5.5 - 6.5tops
I dont have a heater for my reservoir, could this be the culprit?

The first leaf or two often doesn't do so well long term.

You may well not have a problem, the new foliage looks great. I wouldn't do anything different, just keep an eye on it,

AimAim said:

The first leaf or two often doesn't do so well long term.

You may well not have a problem, the new foliage looks great. I wouldn't do anything different, just keep an eye on it,

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So do you think there was a problem when i first saw it a few days ago, and that it will probably be fine from here on out? Because the brown spots only appeared today. the rest of the leaves seem totally fine tho.

Like I said you may not have a problem. I would just keep an eye on it, if you start jacking around with nutes or flushing or whatever and it gets worse you won't know if you haven't addressed the problem, or if you have just caused a problem.

THLee said:

Hey guys on my second grow here and decided to do a different technique, hempy bucket perlite scrog monster (thats the plan anyway)
Growth overall seems slower than last time although i cant properly confirm this.

Few days ago the older leaves started turning yellow and a bit dry
now as you can see from the pictures below they have developed brown spots.
New foliage is green and luscious but, some what cabbagey and curling up.
Ive done a bit of homework and it looks like it could be a magnesium defficiancy?
My ph has been around 5.5 - 6.5tops
I dont have a heater for my reservoir, could this be the culprit?

View attachment 2871407 View attachment 2871408

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Nitrogen + maybe calcium Deficiencies ! The curling is from the heat stress ! Reduce heat or get it a bit farther from the light !
Don't cut the sick parts after adding nutrients ! (They will absorb the additional unwanted feed !) Cheers !

Really? But the temperature at the same level as the plant is around 30degrees, peak has been 35degrees. is that too hot? , and the light is much further away than my last grow as space isnt an issue this time i didnt care about stretch as much. I kinda held off on feeding for a day and things seem to be fine now nothing has spread yellowing hasnt spread into higher leaves all the new growth is nice and green and feels like they should nice n soft rather than rough feeling. I think shes going to be okay
Its annoyed me a bit tho because i wanted to top it soon, but a little bit scared to now until im 100% satisfied shes going to be okay.