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.
Not only is temperature important for your fish but also for the plants you put in your aquarium. Close attention to keeping your temperature in the right range will ensure you have a thriving freshwater aquarium. Temperature Ranges. Most tropical fish prefer a temperature range of 72 to 79 degrees.Most people who operate tropical fish aquariums will keep their tanks at a constant 77 degrees.ther fish, such as Goldfish, will require cooler temperatures that range from 52 to 65 degrees. So mixing Goldfish with freshwater tropical fish will not lead to a successful conclusion. Keeping fish at their ideal temperature will help keep your fish happy and healthy.