Hi guys, new poster long time in the hobby. I am trying to find information on what types of carbon sources may be more beneficial to the consumption of phosphates over nitrates. For instance lets say your tank has near zero nitrates, (meaning undetectable levels), but has po4 at .15-.20ppm. Dosing vodka or vinegar in my experience seems to do little to reduce phosphates as compared to the drastic reduction in nitrates most achieve. I am well aware of gfo and other chemical means to accomplish this but would like to see if it is possible biologically. Again, this is not a noob question, I am well aware of how the cycle operates, I am just trying to see if anyone has experience in using different carbon sources to target specific areas. Thanks