The common question which I often come across is hobbyist asking whether they can use both rocks as decoration in freshwater tanks and my firm answer to them is “Definitely No” except for certain types of cichlids tank which prefer hard water. Back to the saltwater marine tank, apart from rocks as decor, you can also consider adding giant seashells or artificial corals to give the extra natural look and to create the perfect backdrop. Avoid buying dead and bleached natural corals collected from the sea as it is environmentally destructive to follow that practice. Finally depending on your creativity to come up with the best arrangement, just make sure that the whole structure is stable and place them properly so that high gush of water returning from your aquarium filter will not disrupt the balance and cause everything to collapse.
Benefits and Consideration for the types of aquarium decorations