However custom aquariums also give you the added benefit of the fish themselves which provide a kind of tranquil company and give you something to look after and feel proud of as they develop. The versatility of custom aquariums also makes them highly popular as you can choose from a vast range of different fish to make the room as colourful and tropical as you wish, as well as a range of items and decoration for inside the custom aquariums to recreate a shipwreck, a sandy beach, or a range of other aquatic-themed scenes. The only downsides to custom aquariums however are their large size and relatively involved up-keep which means that they will dominate a room and require a fair bit of care and attention to look after. This then makes them perhaps less suited for those with smaller rooms who have more of a `passing interest` in a water feature, or who don`t want to spend a lot of time and money.