Tony Griffitts’s article, Freshwater Carbon Dosing: How to Supercharge Anaerobic Nitrate Reduction , translates a technique long established in saltwater reef keeping—dosing bioavailable organic carbon to drive biological denitrification—into the context of freshwater aquariums and ponds. It presents an intriguing, data-backed look at how carbon sources can manage nitrate accumulation without relying exclusively on frequent, large-volume water changes. Core Strengths Methodological Testing and Empirical Data: Rather than relying purely on theory, Griffitts tests three accessible carbon sources— Sodium Acetate Trihydrate (SAT) , 40% Ethanol (Vodka) , and 5% White Vinegar —across controlled lab setups, an aerated substrate-free bucket, a 30-gallon display aquarium, and a 330-gallon pond. The use of digital colorimeters (such as Hanna Checkers) to track parameters (NO₃, PO₄, KH, GH, pH, TDS) provides valuable empirical context for hobbyists. Detailed Chemical and Biological Comparisons: ...
