How To Clean Rocks For Aquarium. How to clean rocks for aquarium use? First, locate a container big enough to place your rocks in.
Lava rocks in the aquarium enhance the beauty and attractiveness of the aquarium and make your aquarium, visually more appealing. Always be sure to make a diluted solution of no more than 10% bleach and 90% water, and always be sure to rinse off the rocks thoroughly afterward. Clean the filter two weeks later once the outside is clean, the rocks, plants, and other decorations may be returned to the tank.