I have this sad arrowhead + a begonia that it’s on its way out + a sickly pothos. I think I messed up in a few areas but need guidance. - I use grow lights 12 hours/day - I follow the Planta instructions for watering - I gave them some plant food (first time) around 2 weeks ago and followed ratio directions. Soon after, I saw all my plants droop, and leaves yellow. They were not rebounding so a week ago I repotted them in their same pots, but attempt to blot dry the soil with paper towels. I removed some root rot and I also added a decent amount of perlite to help with drainage. This arrowhead was completely dry 2 days ago and staring to droop. I added the smallest bit of water. 2 days later we have no improvement. The two questions I had are, should I always replace big box store soil with something that drains better? And should I not feed plants this young?