Aquarium Gravel Or Marbles. Gravel has been a staple aquarium substrate for years but many hobbyist are starting to use glass marbles. Both substrates have pros and cons. Colored gravel is the classic landscape foundation for freshwater tanks.
The underlying layer you see sitting at the bottom of most aquarium setups is called an aquarium substrate and one of the most common of which is aquarium gravel. Depending on how you plan on setting up.
Gravel and marble are two popular choices.
Colored gravel is the classic landscape foundation for freshwater tanks. Gravel has been a staple aquarium substrate for years but many hobbyist are starting to use glass marbles. Sand gravel river rocks even gravel in fluorescent colors for a more eye catching tank. Smooth vibrant colors gem glass gravel for home decoration vase filler aquarium fillers flower pots decor display.
