Give me technical guide on decreasing salinity level in Larval rearing tank. I want to drop down salinity level from 25 PPT to 0 ppt in 7 days duration in L.Vannamei Laraval's PL stage in larval rearing tank by adding Fresh water source. While decreasing salinity level PL s get stressed. How to avoid/ reduce stress in L.Vannamei PLs during that process. To balance Minerals loss, I add calcium carbonate & Magnesium cloride into the water to make PLs feel less shock from the sudden salinity level change. Is there any formula for how much calcium & Magnesium or any other minerals need to be added into the water for every salinity PPT downing to make PLs strong?

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