What type of aquarium fish doesn't need an aquarium heater to survive? I would love to have an aquarium but I really don't want to go with all of the thermometer and heater issues.
Will a gold fish bother with neon tetras? They have never bothered picking on little xifos since they get feed a lot, but they grow in time unlike tetras.
What is a good size fish tank for a beginner? I want something that won't be extremely expensive at first either.