Nutrient burn, Splash burn or Over-feeding?

Hey guys,

Got a couple Great White Sharks and Himalayan Golds going, 3 Weeks into flowering, couple of the leaves have orange spots on them and are wilting, most of these are near the bottom. I've been using a 12-34-12 early flowering formula. 400 HPS/5 Gallon Pots. Just wondering if it is a splash burn from watering or if it over-feeding, and if over-feeding, what is the best way to correct it at this point...? Cheers, +rep!View attachment 1469170

if it was nutrient burn it would look like someone was burning the very end of the leaf with a lighter i dont think its nutes but i might be wrong. my plants used to do that same thing and now there fine

if it gets worse just flush em out

I was going to switch to a 9-52-9 for late flowering (after the growth spurt), should I flush them before I switch a couple feedings or switch now?

Anyone Else?!