Nitrate??

[FONT=&quot]Keeping excess nutrients out of the aquarium water is one key element in reducing your NO3. As you now know, dirty bio media become a nitrate factory, most people don't use any additional bio media besides live rock in their tanks. There are many other things that can add excess nutrients into your tank like some commercial foods which may contain undesirable things like nitrates, phosphates etc and overfeeding the tank is also another factor. Using , RO/DI water, a high quality salt with no NO3, phosphates etc like Tropic Marin or similar good quality salt should really help too.[/FONT]