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.
The temperature of the water is very important. If there are variances in the temperature of the water it can lead to the demise of all the animal life. A constant temperature is recommended. Tropical aquariums do well at temperatures of 23 to 28 C (73 to 82 F). There are many different types of heaters available.