Brown leave tips, uhoh!!

I'm in day 25 of flowering. I noticed yesterday the leave tips are starting to turn brown. Today it's a little worse. In reading different threads here someone said Chlorine from water will do that. I let my water sit for at least 24 hours before watering plus I put those DeChlor fish drops in just in case. So I don't think it's that. Am I over fertilizing? I'm using Schultz Bloom Plus. I put in 1/4 teaspoon per gallon of water. I feed her every other watering. Is That too much? The only other thing is my PH is low (6.0) but I'm trying to raise it at this time.

excellent link cool

Great link, Thanks!!

so i look at the chart trying to identify my problem, for every one of the symptoms its the same yellow leaves, purple, leaf tips yellwing. I mean come on theres got to be a better chart and then show symptoms and then give us a remedy try to fix the problem.