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Abstract
The study aimed to evaluate the effects of salt content in feed on growth, survival and economic efficiency in commercial tilapia farming. In intensive farming of tilapia, feed usually accounts for 70% of the cost, so researching proper feed will save money. The experiment of adding salt to feed at the levels of 0; 1; 2 and 3% was performed in 8-m3 Composite tanks with the density of 25 fish/m3, fish size: 105.3 ± 0.4 g/fish, using industrial food with the content of 30% protein for a period of 1 month showed: The addition of 1% NaCl to commercial feeds that had 0.9% salt in the feed for tilapia gave the best weight gain: 94.06 g/fish compared to the salt-free experiment and the treatment add 2 and 3% NaCl salt to the feed, respectively: 87.96, 80.64, 74.77 g/fish. Moreover, the addition of salt to the feed reduced the feed consumption ratio, from 1.33 to 1.23, helping to save feed costs up to 7.5% during the grow-out process. Adding 2 and 3% salt to the feed did not affect tilapia survival but increased feed conversion ratio and decreased growth rate of experimental fish.