Whats wrong with my girls

So to start my girls have been in veg for 2 months and on Saturday i picked up some Fox Farm grow big nutes. When i got home i gave them each 1/2 the recommended dose to start. I noticed yesterday some of the lower leaves were turning yellow from nitrogen def so i cut them off and when i got home today some of the leaves were getting brown spots and curling inward. I asked a friend that grows and he said maybe nute deficiency so i just rewatered them with the 1 gal of water and 3 tspns of fox farm which now im thinking was a bad idea. Any help would be greatly appreciated!!!

are you PH'ing your water after you put the fox farm in ? because that stuff will drop your ph too around 4.5 and you will need Ph up. Also what size pot's are those they look small for 2 month.

They're 2.5 gal pots, I was thinking of transplanting into bigger ones this weekend. I ended up flushing them out with pure water and it seemed to stop the nute burn. Yeah I usually have to add baking soda to the nutrient water to make the pH 7.0. Now I just noticed the smaller one has cal/mag deficiency but I don't want to water yet bc of how heavily I watered it tuesday

You never want to just cut off the leaves like that especially with deficiencies. It's not like it's a viral infection that'll spread it means it needs food. If you're not giving them enough food they'll take the food stores out of the older leaves to power new growth. Let them fall off naturally and stop cutting them off. What you're doing there is equivalent to someone who is starving to death being forced to run a marathon.

thanks i didnt know that, ive always been told by the guys at the hydro store to cut them off bc theyre just taking the nutrients away from all the new growth. Thanks again for the heads up

You can pluck dying leaves off, they're not going to get better. Its not bad for the plant to have half necrotic leaves I suppose but its not going to hurt it if you remove it.

Its not like starving someone to death and forcing them to run a marathon at all. I love all the people-plant analogies people make up to give their advice some credibility.

Its like removing a benign tumor and letting a person continue their life without the benign tumor. Hows that one?