What Size of Gravel for an Aquarium?

Setting up a freshwater fish tank can be an easy project. Using the correct type of gravel is essential for the health of the fish. However, sand can be too fine for a fish tank and can cause problems. Gravel is ideal because it holds plants down, hides waste, keeps bottom-feeding fish content and provides a surface for good bacteria to grow.

  1. Size of Gravel

    • There are many different types of gravel for fish tanks and no single specific size works for everyone. A fish owner must make sure that the gravel doesn't have any rough edges that could harm a fish. It shouldn't be so small that it hides food particles, but not too big that it won't anchor plants. Make sure that the gravel is safe for aquariums and that it won't change the pH level of the water.

    Where to Buy

    • To find safe gravel, fish owners should go to a pet store where they can talk to a professional about the type of gravel to use. An employee would be able to advise on the color of the gravel as well as the amount that should be used. Ideally, one pound of gravel should be used for every gallon of water in the tank.

    Preparation

    • Once the correct type of gravel has been purchased, preparations must be made to prevent cloudy tank water and to ensure the health of the fish. Place a small amount of gravel in a clean bucket and push a hose clear to the bottom. Stir the gravel with a clean hand to make sure the water cleans every piece. Rinse until the water runs clear from the rocks.