i do not think there are any chemicals in fresh water
Ocean water has more chemicals in solution than 'freshwater.' The highest concentration being salts in ocean water, hence, saltwater but there are many other chemicals and elements dissolved in sea water, including gold!
98% Freshwater 2% Chemicals to change the properties of the water
There are many chemicals that will kill freshwater snails but they will also kill fish and some will kill plants too. The best way I have found to remove snails is to have a few Clown loaches (Botia macracantha) or a couple of freshwater Puffer fish to kill and eat them.
Quite obviously it is. It is known to have the highest elevation of any freshwater body.
Goldfish urine is toxic to other fish, as well as itself.
Freshwater, of course, is fresh. There isn't any salt or any animals that you would see in the ocean. it's also pretty clear.
Not sure what you mean with your question. Fresh water is tap water that has been conditioned to remove chlorine and/or other chemicals harmful to fish.
Carbon is an element. It does not contain any chemicals but with the exception of hydrogen, is part of more chemicals than any other element.
any chemicals that would help with meth withdrawal
Yes
Chemicals get if fish. Penguins eat fish. Chemicals get in penguins. Any Questions?
A freshwater organism is any celled living creature that can only survive in fresh(non-salted) water.