Big Buddha SAS - Is this nute burn or deficiency?

I'm in Veg, first time in Coco. I don't have a ppm/ec meter but I'm following a journal from a similar grow.

Symptoms:
Interveinal chlorosis in older leaves, slight necrosis of leaf margains. I suspect it's a mixture of a nitrogen deficiency and a bit of nute burn from too much Rhizotonic and not enough a&b

Strain: Bid Buddha Super Automatic Sativa
Duration: Day 24 Veg

Nutes:
2.5ml per L a&b
2ml per L Rhizotonic
pH 5.8-6.0

Setup:
CFL 300w (600w HPS for Flowering)
Humidity 40-50%
Temp 70-75F

Looks like a Magnesium deficiency. Also looks like it could use a bit more Nitrogen also.....

Thanks for the reply, I'll try spraying them with some epsom salt. 1 tsp per L should be enough right? I'll stick a bit of Bio Bizz Grow in the foliar feed too, I'm not sure about using a&b in a foliar feed.

I would worry about spray feeding them. You are growing in coco which is almost impossible to over water so I would be feeding the rootzone...

Cheers mate, I'll probably foliar feed it anyway, my previous Auto grow went badly because I couldn't keep pace with the increased demand for nutrients this strain has, I really don't want to repear that mistake!

whatever you do, dont do anything major. they look like they will be fine. make some small adjustments and see what they do, but they really do look ok. goodluck

Thanks gotigers, I only gave it a very light feed of epsom salts and bio bizz grow. Hopefully it should sort it out.

maybe.....i mean maybe, try bumpin the nutes up a tiny bit at a time and see what it does. thats how i would try to solve it if i knew i was running on the low side anyways.

ive got 5 SAS seeds on the way, can you let me know how tall your plant gets, and also how did ur plant turn out?