Populations of bull sharks are also found in several major rivers, with more than 500 bull sharks thought to be living in the Brisbane River. One was reportedly seen swimming the flooded streets of Brisbane, Queensland, Australia, during the 2010-11 Queensland floods.
exists and is an alternate of . Making the world better, one answer at a time. You could put it through a fine strainer or a piece of mesh so that the sand will fall through and the gravel will stay on top. You could put it through a fine strainer or a piece of mesh so that the sand will fall through and the gravel will stay on top.
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.