Today, Australians of Anglo and other European descent are the dominant majority in Australia, estimated at 85â92% of the total population. Historically, European immigrants had great influence over Australian history and society, which resulted in the perception of Australia as a Western country. Since soon after the beginning of British settlement in 1788, people of European descent have formed the majority of the population in Australia. The majority of Australians are of British â English, Scottish, Welsh, Cornish, or Manx â and Irish ancestral origin (grouped together as Anglo-Celtic).
Another more common reason, is that some rocks or gravel are composed of materials that can cause a change in the pH and hardness of your aquarium water, which in turn can be harmful to your fish.
1 Scoop the gravel out of the old tank and place it in the new tank, then add the water from your buckets to the new tank, leaving the bucket with the fish in it for later. 2  If this is enough water to get the filter started, do so.