Browning edges turning soggy

Hi guys
1st indoor grow end of week 8 growing some autos to get my eye in everythings been pretty good till now, started getting these leafs spreading from the bottom i thought it was cal-mag deficiency so added 1mm in a litre next watering a added 1.5 mm with mollases but its still spreading, also had some new growth and the end if the stretch go curly and a bit lime green and blotchy, its gorrila zkittles auto in soil/perlite temp 24 /21 hum 65/55 ph 6.5 fans on low top and bottom, dyna grow nutes
1st cal-mag watering was last wednesday
Thanks for any help im scratching my head on this one o_O
 

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Looks like a nitrogen defiency or possibly magnesium. When mine start to look like that i correct it with a teaspoon of cal mag in a gallon or epsom salts.
 
PK deficiency ( looks like you are blooming ).
they want more in their feed.

Deficiencies mimic tip burn but usually points to P and K being deficient. Tips brown and serrated edges yellow off.

Watch out for calcium excess ( would think nutes and water already have it ) too much calmag will lock out elements due to excessive use .

It can also mean your base medium is beginning to tap out. You can “ recharge “ that by top dressing MORE SOIL ( fresh ) then watering that in.
 
Now youve said it it makes total sense buds were starting to form and fill out then stopped when this kicked in 10 days ago and shes a big plant fills my tent, ive got other plants on boxes to lift them up, but ive been feeding them all the same, barely any signs of nute burn on the smaller plants obviously now i realise the zkittles plant needed more food, thanks budz & racky im on a huge learning curve and thats another one for the memory bank, will also top dress
 
Again now youve said it the soil does look tired and its the pot thats got the least soil but the biggest plant the others look fresh, cheers guys (: il come back with an update in a few weeks and let you know how things went, it was on a half nutes feed 2.5 mm so il go for maybe 4 mm then stretch the last 2 feeds if she doesn't show any nute burn :)
 
Its still spreading so last night i flushed the plant as it started to look like an excess and lockout, ive allso moved the fans so not directly on any parts of the plants even though only on lightly, allso had humidity issues high 60s-70 so ive opened a window which immediately dropped me to 55, my other plants are super healthy no issues at all just this gorrilla zkittles, fingers crossed she responds
 
Thanks for your input guys, she made it to chop day, bud suffered its fluffy and fox tailed somewhat, but for a 1st attempt taught me several lessons
 

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