| The present study evaluates the physico-chemical characteristics of water in five experimental aquariums maintained under laboratory conditions from April to June 2025. Key parameters such as temperature, pH, ammonia, nitrate, hardness, alkalinity, chloride, fluoride, iron, and free chlorine were analyzed at weekly intervals. Significant variations were observed among tanks due to differences in stocking density, aquatic vegetation, and tank design. Tanks with aquatic plants showed better stability and lower nutrient accumulation. The findings emphasize the importance of proper aquarium management for sustainable ornamental fish culture.
Keywords: Water quality, Aquarium, Ammonia, Nitrate, Ornamental fish, Aquatic vegetation
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