Feeding and filter details for the three freshwater aquaria with controlled nitrogen budgets.

Feeding doses were for cycles of five days on, two days off. The minimum biofilter loading rates are based on the measured nitrate production rates, while the maximum rates assume that all fed nitrogen is nitrified.b, m, t: biofilter bottom, middle and top compartment, respectively. N.A.: not applicable.* For F6 (temporal test), two different fish feed and their corresponding protein content and feed dose are shown by comma-separated text.Feeding and filter details for the three freshwater aquaria with controlled nitrogen budgets.