tempeture

Hey guys I'm new here, so Sunday I bought my 1st female betta, and a moss ball plant not sure if he is even beneficial. The guy at petsmart told me to add regular bottled water. Well got her home set up the tank, added a lucky bamboo which i think is dying. ( Help on this too i want it to stay...

Ok so When I got my betta I told my mom he needs a heater, but she said No! :evil: She said he doesent need one!, I mean sure my room is really warm most of the time! I have a Bearded Dragon so my room stays at about 75-79 degrees. With these conditions, do I need a heater? :?: BTW my room is...