HELP! What’s wrong with this leaf?

[Namelessbob]

This leaf is the same as the rest of the leaves on my plant. It’s clearly not looking good but it isn’t having an obviously detrimental effect on my plant. It’s growing no slower than the other plants that are unaffected. Its the only one I have of it’s strain so it may be a genetic component at work? I’m not sure I just want to se what you guys think and what steps to take to correct it, if any. Thanks in advance.

auto blackberry gum grown in
7 litre air pot
coco coir
1000w mars hydro
canna range of nutes
water p.H 5.8.

[crucialbunny]

Look up magnesium deficiency online and see if that fits what's going on with your plants. Based on your pic that's what I'm seeing. If that's the case then some Epsom feeding might help.

[Namelessbob]

Thanks for the reply. I think you may be right, I’ve looked at a few more pics of magnesium deficiency and they do look very similar. The guide I was using says mag deficiency looks like brown spots but the pics I’ve seen elsewhere say otherwise, so thanks for your input. I’ll treat it with some Epsom salts and see if I get any results.