1944 - Universal adult suffrage introduced; new constitution providing for a popularly-elected House of Representatives promulgated. 1958 - Jamaica becomes a member of the British-sponsored Federation of the West Indies. 1961 - Jamaica withdraws from the Federation of the West Indies.
Guppies prefer a hard water aquarium with a temperature between 25.5Â° and 27.8 Â°C and salt levels equivalent to one tablespoon per 19 litres.In fact, they can withstand levels of salinity up to 150% that of normal seawater.uppies prefer a hard water aquarium with a temperature between 25.5Â° and 27.8 Â°C and salt levels equivalent to one tablespoon per 19 litres.
Temperature. 1  A good range is 76Â° to 80Â°F (25Â° to 27Â°C). A few species need to be kept several degrees warmer, and some species require temperatures a few degrees cooler. 2  A thermometer is vital. A stick-on type enables you to check the temperature whenever you look at the aquarium.