There may be a variety of reasons to look unhealthy. Usually it may be caused by over-watering, for this case, please reduce water to keep the water level above the Min. water level mark or take the plants out to dry for a couple of days. Also if the plants don't get enough light, it will become leggy, for this case, please make sure your light is 1"-2" above the plants. If you can't figure out why your plants look unhealthy, please feel free to submit the Contact Us form, we will help you to solve this issue like we always stand behind our products.