Factor contributing to change of water in lake Bunyonyi

Factors causing lake Bunyonyi color change:Minerals:Dissolved minerals from weathered rocks, such as iron and manganese, can impart colors ranging from red, orall. Calcium carbonate, from limestone, also contributes to color changes Change of waters on lake Bunyonyi has been caused by a reaction of the waters with underground mineral deposits yet to be found or discovered with presence of an external factor say underground reaction. This is the one that has harbored death of fishes. Breakdown XDeposits +H20......Xdep20 + H+ Deposits. Water. Substance ..This happens in presence of an external factor which would either be vulcanicity or underground forces that caused breakthrough of the mineral deposits i.e Fe3c02 Al2co3 etc.But this is the cause .Well Analysis on the samples must be done