Room temperature.
Betta fish do not enjoy currents that come from filters. You could put in a filter but I would recommend not to. Also, Heaters are unnecessary as long as you keep the water 70-80 degrees.
No
If you betta is in a small tank, placing it in a location that has a warm ambient room temperature should be enough to keep it to betta preferred warmth. If you do not, then you should look at getting a small heater for your tank, but you may need to get a larger tank to allow for the use of a heater as there are no heater models made for anything smaller than a 2.5 to 5 gallon tank.
A betta fish can live in water set at room temperature, but anything below 68 will start to become fatal.
With anything new to it's environment, a betta fish will be cautious of anything new to it's tank (this is because of their territorial traits). But depending on the betta, it will take a day or so for it to get used to the props/scenery. But don't be surprised if the betta stays clear of a certain area, he/she may not know if it is safe or not.
72 - 80 degrees Fahrenheit
Pretty much anything including other fish
The temperament of betta fish is influenced by factors such as water quality, tank size, temperature, diet, and social interactions. These factors can affect the overall health and behavior of betta fish.
Because the female will usually try to eat the eggs. He will fight to protect them from anything, even his mate.
78-80F. They are high-end tropical fish.
no way, it doesn't know how to hunt or anything!!:)
Its ok as long as you let the water cool to room temperature before adding the water back to the bowl, or adding the betta to the water. Also, it is completely unnesseary to boil before putting in your betta's bowl.