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.
This way you can avoid water pressure disturbing the gravel from pouring. Don't forget to add some old aquarium water in to your new tank because it will contain lots of beneficial bacteria. This way keep you tank crystal clear. 7) if you have goldfish, it tends to breed on a fresh new water. milky cloud may be sperm cloud.