Although rare, sometimes nematodes can be introduced to your SmallGarden from the outside environment. Nematodes are harmless, but we do recommend drying out your system to get rid of them. To do so, allow your SeedPods to dry out as much as possible until the plants start to be affected (wilt). I would do this by draining your reservoir and allow the SeedPods to get dry and a light brown color (make sure that it doesn't get too dry as this will hurt the plants). This will kill off the nematodes as they need moisture and food (algae) to survive. Once dried, add water and plant food.