Runtz XL not so XL :(

I would ride it out. Doing autos you can simply start another in same area now, and do perpetual Autoflower area. If you have space you can start a steady cycle. Is how I run my Autoflower room. You need to make a few changes in set up for best results. Feel free to dm me after answer selection, and I will happily explain the set up.

The light placement seems fine ... But as everyone has stated your ph is off and needs to be corrected. Try keeping it in the range of 6-6.5.