Rapid yellowing with brown spots

[localhost]

There's a few around the bottom which I presume is normal yellowing due to lack of light. It's periodically around the top.

Hesi flower feed suggests 50ml per 10L, so I've been giving them 12.5ml (5L would be 25ml).
http://www.hesi.nl/l_english/blueh_en.php

I give them the powerzyme at full strength - 2ml per litre.
http://www.hesi.nl/l_english/powerzyme_en.php

I'm not the most experienced, but if I had to take a guess it'd be a magnesium deficiency but your nutes include magnesium so that doesn't seem right... "Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.".

Maybe it's best to wait for a more experienced grower before deciding on something...

[joker_the_smoker]

There's a few around the bottom which I presume is normal yellowing due to lack of light. It's periodically around the top.

Hesi flower feed suggests 50ml per 10L, so I've been giving them 12.5ml (5L would be 25ml).
http://www.hesi.nl/l_english/blueh_en.php

I give them the powerzyme at full strength - 2ml per litre.
http://www.hesi.nl/l_english/powerzyme_en.php

What about veg nutes? Powerzyme can be dropped now mukka.
Manufactures always suggest hell of alot more mate its there way of shaftin ya.

Have you used any calmag in ya feed yet?

[sodangerous]

Veg nutes was Hesi TNT complex at half strength, switched to flower when went to 12/12.

http://www.hesi.nl/l_english/tnt_en.php

I've always ran Powerzyme all the way through, as the Hesi chart suggests? Aware the manufacturers overspec, hence me going half strength. In the past any more than this I've suffered burnt tips etc so this seemed the ideal amount.

No calmag, never used it. Could grab some on Monday though from local grow shop if needed.

[joker_the_smoker]

Veg nutes was Hesi TNT complex at half strength, switched to flower when went to 12/12.

http://www.hesi.nl/l_english/tnt_en.php

I've always ran Powerzyme all the way through, as the Hesi chart suggests? Aware the manufacturers overspec, hence me going half strength. In the past any more than this I've suffered burnt tips etc so this seemed the ideal amount.

No calmag, never used it. Could grab some on Monday though from local grow shop if needed.

They wud suggest that tho to make u use more then u run out an buy more lol.
If am honest mate nxt time ditch the hensi an go with old timers grow.canna rhizotonic. Plant magic bio silicon. Canna Bio flores bloom and old timers organic pk. Had bangin results with that combo. Not a damaged leaf till flush.

So you dropped the veg nutes in favour of using the bloom?

[sodangerous]

Yes mate dropped veg nutes when flipped to 12/12 as per instructions.

[th4k1ng]

Im having this exact same problem. This needs to be corrected ASAP or it spreads to the whole plant. Yellow leaves, red stems and brown patches all over. Worst of all is the buds dont smell right either. They smell 'off'