Would it be a disaster if...

Ok so my plants aren't doing the best by any means. They have a Mg and/or N deficiency that I cant fix no matter what I try.

Would it just destroy my plants if I bumped them up to full strength lucas' formula for the rest of the grow? (I've only been giving them half strength and my PPM is like 1500)

Here is my grow info...

DWC, Rubbermaid grow - Royal Dwarf Fem'd autoflower (light LST)
20/4 light cycle.
44 days old - since Germ.(It's been rough)
PH-5.4/5
PPM- ~1500 (tap H20 is 250) 1/2 Strength Lucas' Formula +epson salts
R.H.- 27-60% depending on how dry towel hanging inside is
Temps- 85*F - high / 70*F - Low

Lemme know what you guys think.... Im pretty much writing this grow off as a failure anyway....

Pics......

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I think it needs N-P-K How big is your res and when did you change it out last and do a flush?

Did you flower them on accident? Or are they male? Or am I just seeing things..

you cant grow pot in meatballs, silly man. lol