That depends more on the fish you are trying to keep. As a general rule most fish can adapt to almost any water conditions as long as it is clean, but not always. Just research the specific fish you are trying to keep to see what pH will work best for it.
yes
It is better for the fish to be put in water that it was found in.
Whether or not a tropical fish can survive in cloudy water depends on why the water is cloudy. If there has been a spike in ammonia or nitrates, it can be deadly to fish. Tropical species tend to be more sensitive to severe water changes than freshwater fish.
A few hours at most.
Most tropical fish will die if left for extended time in cold water. Some tropical fish may be able to tolerate cold water, but the result would likely be early death and disease.
its for tropical fish and salt water fish. they need to have warm water to survive cause were they live is really warm waters
No... but if you put it in Fresh water, then technically it would be. Unfortunatly, it would not survive. :(
It depends on what type of tropical fish you are intending to keep; it ranges from 6 (freshwater & discus) to 8.5 (for cichlids).
Different species of tropical fish require different pH settings. Generally, a tropical fish will thrive in a pH of between 6.5 to 7.5.
it depends on the fish.
No, goldfish are best with goldfish with the exception of weather (dojo) loaches, bristlenose plecos, and apple/mystery snails.Although goldfish can survive in warmer water temperatures, they are a "cold water" fish and not a tropical fish.
You can not put tropical fish in coldwayter bevause they need hot water to survive but you can put goldfish in coldwater becaue they are coldwater fish