hey ppl my b day is coming up 11th november ill be 14 and i hoping to get... a betta! i guessing the tank or bowl will be 1-2 gallons or so, so im not going to have any tank mates with him the tank/bowl i wont need a heater if i keep it at room temp will i? and i have an old filter should i use this or just clean it like a goldfish (moved betta to a box or something stir up rubbish from gravel into the water pour it out put new water in) or just vac the gravel?