No; chlorine damages and destroys the gill tissue, which will cause your fish to die of suffocation.
If by "cleaner" you mean "cleaner wrass" the answer is no. Oscars are fresh water fish and cleaner wrass are marines (ie salt water fish)
OKay animals that live in salt water are sharks, octopuses, star fish, Sea horses, coral, Clown fish, Sting Ray and thousands of other types of fish etc.
only if you catch it then put it in fresh clean water for 1-2 weeks
Your fish will be much happier if you change at least 50% of the tank water every week.
It is okay that you forgot the answer to your security question. Many times these systems have back up plans in this event.
Not every fish is okay, maybe check with a fish expert at a local pet store and see. But, whatever you do, don't put two Siamese Fighting Fish together. They WILL fight!
"fish bowls" are not designed for fish regardless of how they are marketed; you should not keep fish in anything smaller than a 10 gallon tank.
If it smells dead fish and/or it came from unhygenic water then no, if it aint then yes.
no it will basically cook the fish. try about 50 degrees and it will not cook it but not freeze it
no it is not but it depends on the dog and on the type of fish
No.
yes