Alternatives to Gravel for Goldfish Aquariums

Gravel is a popular substrate for all kinds of aquariums, including goldfish tanks. Though it may be inexpensive and visually appealing, gravel can get caught in a goldfish's mouth and trap food and waste particles, leading to excessive waste buildup in the tank. Learn about alternative substrates for goldfish aquariums before starting your next tank to determine which one is best for your goldfish.

  1. Sand

    • Many aquarium hobbyists argue that sand is one of the cleanest substrates because food and waste particles cannot penetrate the compacted surface and become stuck. Because debris will not get stuck in the sand, this type of substrate does not need to be cleaned as often as gravel. The sand can be visually appealing because it comes in many colors. When using sand as a substrate in your goldfish aquarium, adjust the level of your filter to prevent it from sucking sand through the intake tube.

    Peat Moss or Soil

    • Peat moss can be used as a substrate in both live and ground forms. In its live form, peat moss can be beneficial in helping to produce oxygen for your goldfish aquarium. Aquarium soils and peat moss are also good substrates for planted tanks because they produce some of the minerals plants need to thrive. When using ground peat moss as a substrate, put down a layer and cover it with sand or gravel. Some aquarium soils can be used as the sole substrate in an aquarium. Refer to the manufacturer's instructions.

    Laterite or Vermiculite

    • Both laterite and vermiculite are good substrates for planted tanks because they have high carbon and cation exchange rates. These substrates can be used as a lower layer beneath a layer of gravel or sand in planted tanks. Live plants are particularly useful in a goldfish aquarium because goldfish require a high oxygen content and live plants help to re-oxygenate the water in the tank. When using laterite or vermiculite as a substrate, cover the layer completely with gravel or sand before inserting your plants.

    No Substrate

    • Though it may not be as attractive as a tank lined with gravel or sand, a bare-bottomed tank can be very good for your goldfish. Having no substrate at the bottom of your tank makes it much easier for you to clean it. Because goldfish produce so much waste, this option can be helpful. Bare-bottomed tanks also provide your fish with extra room to swim. To successfully pull off a tank with no substrate, purchase a few live potted aquarium plants. Supplement them with rocks and pieces of driftwood for decoration.