Magnetically Treated Water: Enhancing Stocking Density, Water Quality, and Growth in Nile Tilapia (Oreochromis niloticus)

Mortada M. A. Hussein, Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, EgyptFollow
Ayatollah A. H. Abd-El Said, Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, EgyptFollow
Asmaa N. Mohammed, Department of Hygiene, Zoonoses and Epidemiology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, EgyptFollow
Fatma M. M. Korni, Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, EgyptFollow

Abstract

This study aimed to explore the potential of using magnetic treated water (MTW) to increase stocking densities of growing Nile tilapia, Oreochromis niloticus, in storage, productive, and/or rearing holding facilities with limited mortality and water loss. The experimental period was 12 weeks, with 1500 O. niloticus fingerlings acclimated with maintained water parameters. After acclimation, 1350 were randomly selected and used for experiment setting up, including its triplicates. For each replicate, 225 fingerlings were distributed in three experimental tanks of MTW units as group set A, B and C, each received 50, 75, and 100 fingerlings, respectively. Besides, 225 fingerlings were distributed in three control tanks D, E, and F in the same manner without magnetic device application. The fingerlings were fed fish floating pellets at a rate of 4% of their body weight for nine weeks, then decreased to 3% until the end of experiment. Dissolved oxygen (DO) was measured twice a week, total ammonia nitrogen (TAN) and nitrite concentration were estimated once, along with daily mortality observations. Results showed significant increases in survival rates for groups A, B and C (99.33%, 97.33%, and 92.00%) compared to control groups D, E, and F (88.00%, 86.00%, and 84.00%), respectively. Growth performance was higher in the experimental groups, with group C showing the best results (WG: 110.00 gm/fish, SGR: 111.13% per day, FCR: 1.17). Significant differences were found in DO concentrations and water replacement but not in TAN and nitrite levels. In conclusion, this study highlighted benefits of using MTW to enhance fish storage, rearing, and production at various intensification levels.

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Recommended Citation

Hussein, Mortada M. A.; Said, Ayatollah A. H. Abd-El; Mohammed, Asmaa N.; and Korni, Fatma M. M. (2026) "Magnetically Treated Water: Enhancing Stocking Density, Water Quality, and Growth in Nile Tilapia (Oreochromis niloticus)," Journal of King Abdulaziz University: Marine Science: Vol. 36: No. 1, Article 7.
DOI: https://doi.org/10.64064/1658-4325.1029