what is this deficiency?? Its killing my leaf rapidly!!!!

Hi everyone...

check out the pics, i think its a mixture of calcium, magnisium, iron?? the thing is, ive never had a deficiency kill leaf so damn quicly!!! they go to the state they are in the pics in 1 day basically... i water with ph water of 6.6-7.

The nutes they got so far or only biobizz grow and only once a week at 4 ml a litre which is hardly a lot.

I've also did a mild foliar spray on them with biobizz fishmix.

when i first saw a deficiency of mg i gave them some epsom salt, ever since the leaf have gone mad just like in the pictures.... not sure why? They are growing in a tent with good temps and good fresh air coming in. any ideas on how to fix tis problem? it starts mostly with brown dots onthe leaf until it turns to the state they are in the pictures...

I've also did a mild foliar spray on them with biobizz fishmix.

Click to expand...

Don't mist/spray the leaves.

Looks a bit like potassium def? Though the only deficiencies I have seen as yellow as yours are nitrogen/zinc.

find it hard to believe its nitrogen cause i've been feeding it grow and ive had plants that were fed nothing and still did just fine, they dont suffer without nitrogen, its just a good additive...

Epsom salts tent to make salts builds up quickly, Dolomite lime works best. It does looks like Mg and Fe and also shows hints of K like socaliboy said which is weird, so in overall your pH must be out of whack. Try flushing with some diluted dolomite (2tsp per gallon) and add superthrive if you have some in hand

cool ill try that... i thought it would be a burn rather than deficiency just cause until I started putting epsom in there everthing was fine. perfect shinny green leaf. added epsom and then biobizz once a week and all the shit started. dont get it. never had a reaction like that from plants before... they are on 24hr lights by the way... temps are fine..