Hydrogen peroxide (H₂O₂) is widely used for disinfection in recirculating aquaculture systems (RAS), yet its effects on biofilter performance and fish health remain dosage-dependent. In this study, we evaluated the impacts of weekly H₂O₂ treatments (0, 5, 15, and 30 mg/L) over a 5-week period on water quality, nitrification, and the physiological condition of juvenile Hexagrammos otakii in lab-scale RAS. Low concentration H₂O₂...

Evaluating the interaction between dissolved oxygen (DO) and feeding rates (FRs) in fish is crucial for the precise regulation of aquaculture water environments. This study established four treatment groups: the CK group (DO = 6 mg/L, FR = 2% of body weight), the HFR group (DO = 6 mg/L, FR = 3.5% of body weight), the HDO group (DO = 9 mg/L, FR = 2% of body weight), and the MIX group (DO = 6 mg/L, FR = 3.5% of body weight). The...