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.
up vote 6 down vote accepted. Crushed gravel is the media of choice for providing drainage. What you want is to have the maximum amount of airspace in the drainage layer so water has somewhere to go.Normally you would use 5/8 or even 7/8 crushed gravel but 3/8 will do.Pea stone gravel would not be my first choice as it will pack down over time and provide less airspace than the irregular shapes of crushed gravel.p vote 6 down vote accepted. Crushed gravel is the media of choice for providing drainage. What you want is to have the maximum amount of airspace in the drainage layer so water has somewhere to go.