You have mustard algae. Have your local pool store test for phosphates. I can almost guarantee you have them. This makes you a candidate for mustard algae. You should try a product that removes phosphates. LoChlor's Algaecide and Starver Treatment is the best.
A mold fungus.
A vacuum and a black hole are two very different things.
The company that manufactures the Dust Buster vacuum is Black & Decker. The Dust Buster vacuum by Black & Decker is typically a handheld cordless vacuum.
The best vacuum cleaner is the Black and Decker PD1200. However if you are looking for a handheld cleaner then the best is the Black and Decker PV1825N.
That is the vacuum supply for the HVAC control.
There are several vacuum hoses. They are the small black tubes that connect things.
It really has no effect because a vacuum people say that a vacuum is just like a black hole it is but it is basically it reflects light!
No, there are trace amounts of gas and dust.
No, a black hole contains a lot of matter and thus has a huge gravitational pull. Absolute vacuum doesn't exist anywhere we know of.
The causual organism for black rust on wheat is known as Puccina Graminis. This is common organism that causes the splotches on the stems of different kinds of plants, including wheat plants.
The best way to clean black leather is to vacuum and dust with a dry rag. For deeper cleaning or to remove stains it is best to follow the manufacture's instructions as there are different kinds of leather requiring different kinds of care.
With a mop or a vacuum cleaner?