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.
5. Lastly, wash all of your substrate (gravel) before you add it to your tank. This is a simple process. Place it in a clean bucket and rinse water over it while you mix it up with your hands or a spoon. As you do this, continually check the water as it runs over the gravel. When itâs clear, the gravel is clean. When placing the substrate into the tank, pile it higher in the back than it is in the front.