Check the listing for details. REFUEL Amino Acid Enriched Bacterial Food Source (500 ml) - Polyplab. Condition: New. Listed at 69.00 USD. Refuel is a unique fusion of organic carbon sources enriched with amino acids. It is a safe and highly effective carbon-based bacterial food source that will steadily improve water quality. The process is very gentle, and will not have any negative effects on your existing corals. Refuel is a fundamental component of our 4-part System Reef-resh. We recommend using all components of this system to maximize the efficacy of this product. Directions: Using the syringe, extra the appropriate amount of Refuel based on the dosage chat. Dose Refuel in the sump or an area of strong flow in your aquarium. Dosage: For every 25G of system volume, use the chart to determine the correct amount of dose for your aquarium. For optimum results, dose this product during the day while lights are on. Listing and template services provided by inkFrog