Most of my plants are turning around after I nearly killed them before asking for your all's advice on what I was doing wrong. This is one of my two strongest looking plants but I have noticed the tips turning brown and crispy. They are still very young and I am giving straight water, with a ph of 7.5 if it matters and ppm 220ish. Temp hovers around 80, humidity at around 50%. Lights are about 18 inches from them and I have a slight breeze blowing through. What are your thoughts?