- Contains Live Feed
Saltwater Aquarium Substrate
Substrate is a crucial element of any saltwater aquarium design. Not only does it help give your tank a natural aesthetic, but saltwater aquarium substrate supports biological filtration by providing surface area for beneficial bacteria to colonize. Certain types of substrate may also buffer pH or boost calcium levels to promote healthy coral growth. Chewy carries a wide range of saltwater aquarium substrates, such as:
- Aragonite sand: Made of calcium carbonite and sold in various colors and grain sizes
- Live sand: Aquarium sand infused with beneficial marine bacteria to support biofiltration
- Gravel: Available in a wide range of colors and sizes
- Rocks: Popular options include reef rock, dragon stone, and petrified wood
- Sea glass: Decorative substrate available in single and mixed colors
To determine how much saltwater aquarium substrate you need, first decide how deep you want your substrate bed to be. A minimum of 1-2 inches is recommended, but deep sand beds can be beneficial for biofiltration and may be essential for tanks stocked with burrowing species. A good general rule to start with is about one pound of substrate per gallon of tank water.
Frequently Asked Questions about Saltwater Aquarium Substrate
What is the ideal substrate for a saltwater aquarium?
Aragonite sand is generally considered the ideal substrate for a saltwater aquarium. Not only does it give your tank a natural aesthetic, but it helps buffer pH levels and provides essential nutrients corals and invertebrates need to thrive.
How often should you replace a saltwater tank's substrate?
It's generally not necessary to replace a saltwater tank's substrate. You will, however, need to stir or clean it during water changes on a weekly or bi-weekly basis to help remove accumulated waste.