How to treat this problem depends on several factors. First what type of pool surface do you have? Next what specific chemicals were used in the staining? How many gallons of water do you have in your pool? What type of sanitizer are you currently using in your pool? What is your complete balance including total alkalinity and calcium hardness? What color is the stain? What are the copper or iron levels in the pool water? Do you use well water? Is it treated or untreated? With these questions answered we can help formulate a solution to your problem. The best way to try to resolve this issue is to take a pool water sample along with a picture of the stains and show them to you local pool store. If you can find a store that sells a line of products made by Jack's Magic that would be best. Jack's Magic makes a line of stain removing chemicals and has complete processes to remove the stains.
Coffee is brown because of a pigment known as a "tannin". The same pigment is responsible for the staining of carpet when coffee is spilled and for staining teeth when drinking coffee.
mercury
How you can best clean up spilled polyurethane will depend on where it is spilled. If it is spilled on a laminate floor, rags dampened in mineral spirits will work well. If the spill is on concrete, paint thinner will clean it up.
chemicals can go anywhere on the floor on the table even on walls and if you buy dettol complete it will wipe away chemicals for long last
set it on fire
That liquid is toxic, so don't drink it. The toxic chemicals spilled into the stream.
The balance may be damaged or contaminated.
the flash got his powers when he was in his lab when a bolt of lightning hit him and chemicals spilled on him
The man chiseled away the concrete which had been spilled by the workers on the roof.
Pollution is any unwanted substance being where it should not be, contaminating the substance. An example could be gasoline spilled on the concrete surface at a gas station. You wanted the gas to go into the fuel tank but some spilled. The spilled gas is a contaminant, not wanted on the concrete. It must be cleaned up before it spreads and gets into the soil or a storm drain and causes more problems.
Let bleach soak on it than maybe power-wash it away.
There are many things that are used to soak up oil that has been spilled. At times, sawdust is used to soak up the oil. Sometimes, a special solid similar to concrete will be used.