You mean substrate?
Its the rock, sand, gravel, whatever on the bottom of an aquarium.
because the fish want it
I have a 120 Gallon aquarium with sand. They love it.
a terrarium empty.
sedimentation
Yes ofcourse you can have them in your saltwater aquarium. You have to provide some space in your tank with good sand and feeding sand dollars is easy, for they mostly eat suspended organic matters and other fish wastes.
Sand Masters - 2011 Aquarium of the Pacific 1-12 was released on: USA: 21 August 2011
yes you can
To effectively clean and maintain sand for your aquarium, you can wash the sand by rinsing it thoroughly with water until the water runs clear. This helps remove debris and dirt. Repeat the rinsing process until the water remains clear. It is important to use a fine mesh sieve to prevent the sand from washing away. Additionally, you can also use a gravel vacuum to clean the sand while doing regular water changes in your aquarium.
Yes, but be prepared for some cloudy water.
No because the sand will make the water dirty, small rocks are usually the best.
Non-living things in an aquarium can include gravel or sand for substrate, rocks or driftwood for decoration, artificial plants, filters, heaters, air pumps, lighting fixtures, and the aquarium itself (tank, lid, stand).