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The objective of this study was to demonstrate the pH effects on growth, survival, water quality, proximal composition of bioflocs and oxidative stress of Nile tilapia in biofloc technology (BFT) system. Twenty‐five fish (3.68 ± 0.93 g) were distributed in each tank (useful vol. 37.5 L), utilizing treatments with pH 8.3, 7.5 and 6.5 at 60 days. During the experiment, the oxidation of total ammonia...
In biofloc technology (BFT) systems, nutrient cycling for microorganisms takes place. This results in minimal or null water exchange. The sum of fish biomass and microorganisms favors alkalinity consumption and, consequently, pH reduction. It is in this context that the present study evaluates alkalinity and pH maintenance using sodium bicarbonate (NaHCO3), calcium carbonate (CaCO3) or calcium hydroxide...
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