I never move my fish!
Fish can die when they are moved as this stresses them.
When you clean them even refrain from moving them,
empty half the tank with a jug or cup and then fill the rest of the tank with treated tank water.
the densities are different (Saltwater has a greater density than freshwater.)
It can realy vary depending on the location of the freshwater climate.
Freshwater snails typically grow to be around 1 to 2 inches in size.
because it goes in circles like going around the world
It is usually around 9.25 pounds.
Around 68.7% of Earth's freshwater is currently inaccessible, as it is stored in glaciers and ice caps. This inaccessible freshwater is primarily located in Antarctica and Greenland.
about 3% is freshwater
The Latin name for freshwater clams is generally referred to as "Unionidae," which is the family that includes many species of freshwater bivalves. Common examples include the genera "Lampsilis" and "Anodonta." These clams are found in various freshwater habitats around the world.
it changes depending on where it is
For freshwater, I would say around 7.
Most of the freshwater on Earth is found in glaciers and ice caps (around 68.7%), followed by groundwater (around 30.1%), with a very small percentage in rivers, lakes, and the atmosphere.
By volume, that would be Lake Baikal located in southern Siberia, Russia. It holds around 20% of the world's freshwater.