If you have any questions or comments, please leave them below! Fiji Rock is the most common type of live rock used in reef tanks. It’s illegal to import true Seiryu, but convincing look-alikes are available. your fingernail across the stone should not leave a mark, A single beautiful stone or piece of glass will create a beautiful centerpiece in a betta aquarium. If you’re really worried that your rock is going to introduce an unwanted life form, bleaching will kill everything and loosen up organic matter. These are just made-up names given to the color variants of quartzite. PAGE FOUR       The Methods, Smaller aquariums will need smaller rocks to look right in the tank.