Ndefil
Aquarium Advice Activist
Hi everyone! I have a fully stocked 20 gallon long freshwater tank, and I would really like to change from my dingy looking gravel to black sand or black gravel or white sand? How involved is this ? Do I need to take the fish out ? Will it look ok if I just put a thick coat of black gravel on top of my current substrate ? What's the best and easiest way to do this? I don't really want to change my rock work either I love it!Hopefully you guys can help!