Reef Bio Pellet.Fuel is gentle on the system, it provides an alcohol free, non-flammable and sugar free rich carbon source for accelerated growth of bacteria & bacterioplankton for food sources for corals and other invertebrates as well as for the crucial functions of nitrification, denitrification, nutrient assimilation and remineralization. Proper use of Reef Bio Pellet.Fuel will result in reduction of nitrates and phosphates to very low levels providing for a cleaner and more beautiful aquarium. Use in aquarium keeping: Directions: Always use this product with a well-functioning protein skimmer and employ strong aquarium circulation or aeration to maintain proper dissolved oxygen levels. Monitor phosphate and nitrate test readings during use. If, at any time, cloudiness develops, reduce dosage. Add Bacter products at dosages recommended on their bottles, just after use. Add the following dosages of Reef BioPellet.Fuel, depending on type of system Normal Systems: Bio.Pellet Fuel is stronger and more efficient than most competing brands, so only add 20 ml (12 grams) per 25 US-gallons (100 L) of water to start (this is only 1/5 to 1/2 the dosage required by competing products). After two weeks usage, you may double the dose if nitrates and phosphate levels are still high. You may also continue to increase the dosage, as necessary, after initial use. Low Nutrient Systems: Add 10 ml (6 grams) per 25 US-gallons (100 L) of water to start. After two weeks usage, you may double the dose if nitrates and phosphate levels are still high. Caution: Keep out of reach of children. Not for human consumption. If ingested drink water. If in eyes flush with water.