Sick plant, nutrient toxicity?

Yep, nute burn from soil being a bit too hot... its not too bad and remember this, we are trying to grow flowers not leaves, so it doesnt matter if you slightly fry the odd leaf here and there along the way but try to get it all sorted BEFORE you go into flower, until then, a slight nute burnt leaf wont do the plant any harm. Just keep watering as normal with plain old water and the plant will use it up before it goes into flower. If it looks like its getting really bad, you may need to pour 3-4 times as much water as normal on her to flush some of the nutes out a bit but generally in soil that isnt a great idea unless you really have to. You are going to snip these leaves off in a months time anyways so dont worry for now okies? You can up the humidity of the tent/room a bit for a week to two weeks to slow how much the plants feed so they take on less nutes but dont do it any longer than two weeks or you will run into deficiency probs from them not feeding as much. Around 65% or so will do that.

Well, that is def nute burn. I have not heard many say that happy frog is too hot. Mostly Ocean Forest. Although, I do recall hearing some say that the mixing of Happy Frog ingredients can be hit or miss. Was the soil amended with anything else? I guess if this were my plant, I would flush a gallon or two of clean water through the pot and cross my fingers.