Nute burn or something else?

I just went to check on my plants and I noticed that one of them had some leaves with brown edges and tips. To me this looks like nute burn, but I just wanted to be sure. I just transplanted them 4 days ago and I gave them 1/4 teaspoon of superthrive in a gallon of water right after I transplanted them and I gave them 1/8 teaspoon of it in a gallon for the next couple of waterings. Could that be the cause of it?
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Yap. First signs of overfeeding

Sorry I was wrong, I dunno what is this. Brown edges and tips look like overfeeding, but those white spots are something new for me. Might be clorin spots or dunno. Someone correct me pls.

Nute burn usually shows up in new growth. Seeing as how its the tips, that leads me to believe that its either some kind of deficiency or some kind of lockout before it would be nute burn.

There is, however, something called eutrophication that happens when a plant is overfed. Do some searching on that and compare, maybe that's what's going on.

Dude, do you not read the directions on the bottle of superthrive??? A drop a gallon means A DROP A GALLON! Superthrive contains no food. It is just vitamins and hormones.