We accept all returns if we are notified within 30 days of the time when you agreed to purchase the item. If the item is defective you must notify us immediately. Food and additives items may not be returned if they have been opened and used unless it is verified the product is defective. We do not accept returns for used products. All returns must arrive to us in new, unused, re-sellable condition. Aquarium Specialty cannot accept returns of products once they have been opened and used. Before opening each product, please check its packaging and label carefully to be sure you received the correct product. If the supplier's original packaging and seal is still intact, you may return the product to us within 30 days from purchase for an exchange, merchandise credit or refund (excluding shipping and handling charges), subject to a 10% restocking fee. Return shipping charges incurred are the responsibility of the customer.