Check the listing for details. Fluval Biological Enhancer for Aquariums, 4-Ounce. Condition: New. Listed at 10.49 USD. Fluval Biological Enhancer for Aquariums, 4-Ounce Description Fluval Biological Enhancer is a responsive biological aquarium supplement that ensures that all aquariums are immediately inoculated with a powerful team of beneficial bacteria, providing a safe biological habitat for your fish. These highly effective micro-organisms will create a biological flora that quickly metabolizes lethal ammonia and nitrite and allow for the immediate introduction of fish. Applications: Fluval Biological Enhancer is strongly recommended for new aquarium set-ups and regular application will help to exclude the establishment of undesirable bacteria in aquariums. Features Performance driven at affordable prices Made in the USA with quality materials Field tested to ensure nothing but the best for your pet About Us We want to provide you with the hottest deals on the internet. Every item we sell are ready to ship and most items ship within 24 hours during business days. We try to answer all questions within 24 hours Monday - Friday. Send us a eBay message, we are always here to help you. Payment Only Paypal Payments are accepted at this time, however you may utilize the tools within PayPal to pay via your credit card. Shipping Handling Time: We ship Next Business Day - Monday to Friday in most cases. Please understand that an occasional delay may occur. Domestic Shipping - Domestic Shipping takes typically takes 3-5 business days via our normal shipping carriers. All Domestic US to US shipping will be indicated as Standard Shipping during checkout. Shipping Choices will be made depending on size and order weight. We do not ship to Hawaii, Alaska, US Territories or PO Boxes. Please ensure the address you provided was correct, as changes cannot be made after payment has been made. All orders are shipped to address you provided during ebay checkout. We only ship to address indicated during Paypal Checkout, please ensure your shipping address in Paypal and Ebay is your intended delivery address. Returns No Questions Asked - All returns accepted. You should contact us within 30 days after your order is placed for a free return label. Refund given as Money Back.