i have been reading old information about mahachai bettas being brackish water dwelling bettas.
for this discussion and purpouses brackish water is defined as a mix of salt and sea water with an sg of more than 1.005 and less than full sea water.
i have not found any indication that the mahachai bettas is not brackish tollerant but information is not easy for me to find that is recent mostly they are 3 - 5 years old and talking about the "new betta speicies"
any links or information would be greatly appreciated.
thanks