Your water must be pretty rotten if the air bubbles remain as bubbles instead of bursting immediately they reach the surface. My advice is to do two things. 1 is to replace the airstone with a filter ASAP and the other is to do a water change NOW. The basic rules of sucessfull fishkeeping are. :- 1 inch of fish must have at least 1 gallon of water. :- Every Tank must have a permanently running 'cycled' filter. :- Every tank must have at least 50% of its water replaced every week. If you keep the above rules your fish can do well. If you fail in the above I can guarantee that your fish will get sick and die way before they should.
Subterranean is defined as meaning lying under the surface of the earth. An example of this term would a subterranean river that is known to lie completely or almost completely under the surface of the earth.
Don't worry. It is not going to be completely worn out. It has been covered by gold. A very small part of it is uncovered. The piilgrims just touch the outer covering. The black stone is almost completely covered and firmly fixed.
This is normal for a great many fish. In nature there is often food at the surface (bugs and such). It can also mean that there is not enough oxygen in the water. If the fish are starved for oxygen they will look elsewhere for oxygen. They will put their mouth at the surface and open and close it. It almost looks like they're trying to blow bubbles. If this is the case, get an air pump and aerator and put it in the water. The bubbles flowing through the water will add oxygen to the water.
actually bubbles can be almost any shape, it depends on how it is built up, or how it was blown. or your question may be how come bubbles cant be spheres in which case it can be.
The three continents that are completely or almost completely within the Northern Hemisphere are North America, Europe, and Asia. Africa is the only continent that spans both the Northern and Southern Hemispheres.
Early in its history Earth was either completely or almost completely molten. The liquid state allowed the denser materials to sink deeper into Earth's interior while less dense materials floated closer to the surface.
The elements that are almost completely unreactive are the noble gases in group 18.
If completely empty it holds almost 12.If completely empty it holds almost 12.
Completely empty it will hold almost 9.Completely empty it will hold almost 9.
The diet of Koalas is made up almost completely of eucalyptus leaves.
An area of land almost completely surrounded by water is called a peninsula. A peninsula is a narrow strip of land that extends out into a body of water and is connected to the mainland on one side.
We know almost nothing about the geography of Pluto, owing to its small size and great distance. It seems likely that the surface is not completely smooth, so the existence of canyons cannot be ruled out.