I have been looking into starting a carbon source dosing routine but have not had much luck find information on the different methods. I am interested in Prodibio, vodka dosing and Brightwell. I have not read much at all for Brightwell, but my LFS carries Brightwell. Prodibio is very attractive because of the twice a month dosing and I have read only good reviews. I guess my first question should be: do I need carbon source dosing? My nitrates have leveled out to about 5-10ppm but I plan to add more fish in the future. My API test has never shown any phosphates but I am unsure if it is accurate. The tank is 4 months old and I am moving towards all stony, mostly SPS coral. Any information would be greatly appreciated.