Here is some info.
http://aquanic.org/publicat/usda_rac/efs/srac/300fs.pdf Hybrids survive and do well in a wide range of environmental conditions. A temperature range of 4 to 33 C (39 to 91 F ) is acceptable, but optimum growth occurs within a temperature range of 25 to 27° C. Hybrids are generally stocked into freshwater systems but they do well in salinities of O to 25 ppt, and some can survive salinities up to full strength seawater (35 ppt). Dissolved oxygen levels as low as 1 mg/l can be tolerated for a short period of time, but optimum dissolved oxygen levels range from 6 to 12 mg/1. Hybrid striped bass are stocked into a variety of water quality situations with regard to alkalinity, hardness and pH. Alkalinity values of 100 mg/1 or above are preferred but levels less than 20 mg/1 are suitable. Hardness and alkalinity are usually related and similar values could be given for hardness. A pH range of 7.0 to 8.5 is optimum for growth, but a much wider range is tolerated. Hybrids in culture ponds have survived repeated exposure to a pH of 2.5 for short periods of time.
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