What you need to know: While technically a bit larger than a 10-gallon tank, this tank is still a compact option with its 13.5-gallon size, perfect for people who want to keep a saltwater tank.

Step 1 – Choose the Right Tank Size Contrary to popular belief, Betta fish need a lot more than just a tiny bowl to thrive and live their best life.

Your tank develops a natural balance that supports your pet fish. To avoid changing the water completely, you can do it 10%-15% at a time to allow for the introduction of new water over time.

Work methodically using a sand or gravel siphon — this is called vacuuming — to remove the worms from the sides and bottom of your fish tank. Make sure you don’t remove more than 10%-15% of ...

A graduate from Loughborough University created the 15-litre tank, which is packed with technology enabling fish, plants and bacteria 'to work together to create a balanced ecosystem'.

Key Specs Dimensions: 11.9 x 9.8 x 11.9 inches (2.5-gallon size) Weight: 3.75 pounds Capacity: 1, 2.5, or 5 gallons First-time fish owners are sure to love this fish tank from Aqueon. At just ...