There are many types of aquarium substrate to choose from nowadays; substrate choices range from neon colored gravel to all natural looking sand types. Because the substrate is an important place for beneficial bacteria to grow, using it is recommended in most cases. However, choosing the right substrate can be a bit of a challenge, because each type has a different effect on your aquarium and fish. Keep reading for a list of the most common aquarium substrate types and their pros and cons, which will hopefully help make the choice a bit easier!
Gravel is probably the most commonly used aquarium substrate. It’s available in many particle sizes and shapes and is often dyed in bright, artificial colors. There is a type of gravel for almost every setup – with a few exceptions.
If you’re thinking of using gravel, consider your stock first! Be sure to check which substrate the fish you’re interested in will do best on. Some species, like Corydoras catfish, like to sift through the substrate to find their food. Gravel will make this quite difficult for them, and sharp gravel may even damage their delicate barbels and cause rot. Other aquarium fish, like Kuhli loaches, like to burrow into the substrate and have delicate bellies that may get damaged by sharp gravel. Using sand is not absolutely necessary for these species, but it will allow them to show their natural bevior. One species that should not be kept on gravel at all is the ever-popular goldfish; gravel can get stuck in their throat and you may end up having to take it out with a pair of tweezers, which obviously causes the fish a lot of stress.
Another point to keep in mind if you’re considering gravel, especially bigger sizes, is the fact that dirt particles and uneaten foods will be quite difficult to remove. They can build up and cause bad water quality when the gravel is disturbed after a longer time. If you do decide to go with gravel, especially with the fish species mentioned above, a smaller, polished type is probably your best bet! Natural colors will also be Continue reading