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A bed load is a collection of large particles of sediment which are carried along the bottom of a stream.
the sand and gravel provide physical filtering of the water, and remove large particles. The Charcoal has very small pores, and a large surface area. it removes smaller particles and absorbs some chemicals and odors.
Yes, it is very important to rinse gravel before adding it to the tank to get rid of dust and debris. The tiny particles in the gravel can also just plain make a tank look bad until they have a chance to settle over a period of a few days. A large spaghetti strainer works well to rinse gravel and remove any of the smaller particles and debris.
Do not use gravel in a turtle tank. They will eat it and it can cause serious problemlems - even death. If you do want to use gravel it must be very large gravel so that they cannot eat it but you may also just have a bare bottom - it is easier to clean also.
Clay particles are very fine grained and light weight, so easily carried along by flowing water.
The word that explains this is deposition
goes faster thru gravel sice the interparticulate spaces are high water can flow in large amounts swiftly. but since sand particles are closely packed it is impossible & result a dull slow flow and im brian
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Since it has particles large enough to cause sedimentation in the bottom of the glass, I'd say yes.
Uptake of large particles
Facts about the actors and film appearing in large white lettering along the bottom of the screen.