Mold growth is often influenced by water quality and air humidity, as well as the quality of the seeds you purchase. Here are our recommendations for seed selection: A. When purchasing seeds, check the seed's shelf life. B. Avoid buying and using white or green seeds. Look for high-quality seeds with darker colors like gray, brown, or black. C. Examine the seed's surface. Look for seeds with a lustrous appearance that can reflect light. They should also have a sturdy and smooth texture. D. Consider the symmetry and shape of the seeds. Look for seeds with symmetrical and teardrop shapes, as deformities or unevenness may indicate poor seed quality or immaturity. E. Purchase seeds from reliable brands and distributors. To prevent and treat mold/algae buildup, here are the solutions: A. Thoroughly drain and rinse the water tank, discard any sponges or plants that have come into contact with mold/algae, and clean the used planting baskets and covers. Keep all accessories used in the system clean. B. During the planting and seedling stages, cover the sponge and the top of the white baskets with our seed pod stickers. Also, use the blackout covers to shield unused pods to prevent the water tank from being exposed to light, which can promote mold and green algae growth.