Whats going on peoples. My first post and my first grow. I have 3 white widows under a 400w hps lighting. Im growing hydroponically. I have an air stone set up. The plants were growing fine untill one day my air pump failed on me. the roots werent getting any oxygen for 2 days. I got the new air pump and the plant is still living. the stem is still green and the on the leaves the tips are yellow. Is there any way to fix this problem? I germinated these seeds 3 months ago. I keep my Ph balanced to 6.5-6.9. I also used miricle grow and some epsom salt. I dont want to waste this grow. your advice would be GREATLY APPREICIATED. Thank you.