When beginning a hobby, it’s usually best to start small: planting a few plants before growing a garden, for example, or running a few miles before trying a marathon. But in the world of fish tanks and aquaria, it’s best to start big.
For beginners, bigger fish tanks are better. By big, we mean tanks of at least 20-gallons, which are larger than the 10-gallon tanks usually chosen by first timers. Here’s why…
- Small tanks are prone to quick changes of temperature and pH. Having a stable ecosystem is vital, but is harder to maintain in a smaller tank.
- With a smaller tank, you’ll have a smaller margin for error. It’s easier to overstock or overfeed, which leads to more waste and more problems with water quality.
- Certain types of fish, like goldfish, generate more waste, which could also affect water quality.
- You will have to change water more frequently with a smaller aquarium.
- Fish grow. What might have seemed a manageable number at first, could lead to an overstocked aquarium later.
A small aquarium may seem easier to manage, but may actually handicap you when it comes time to correct any problems. If you’re a beginning aquarist, play it safe. Get a larger fish tank for healthier fish and easier maintenance.
Need help? Speak to a Pet Supermarket associate for help choosing an aquarium.


