Please help, brown spots and curling leaves

So hows everything going dude. Im very curious to see where your standing now. Post some pics man

shit i have the same exact problem. If you could do another post telling me how you fixed the problem, (or if you did at all). So basically what everyone suggests is to flush the soil and try and stabalize the ph. Is that all i can do? Its only affecting one plant but it is my trophy girl and I need the money I make from her.