The best fish tank decorations in our review are the Mini Carribean living reef, the Volcano Ornament kit, and the SpongeBob Pineapple House. Before getting into our top 5 review, it’s important to mention what you should look for in an aquarium decoration:

How to decorate a fish tank

A fish tank can look really bland if you don’t know how to decorate it tastefully. On the other hand, it’s easy to go overboard with decorating. So as to achieve aesthetic harmony, pay attention to both quality and quantity.

Certain aquarium decorations can be harmful to your fish, for example: sharp objects, metals, plastic, painted objects, etc. Paint may flake off, contaminate the water and in turn, poison your fish. If you opt for aquarium decorations made out of wood, make sure that they’re clean. You won’t want to find any unpleasant surprises like creepy crawlies or the remnants of insects.

Less is more. For example, if your fish tank is already full of plants, only pick out an ornament or two. The focal point of every aquarium is always its plant life, so other fish tank decorations are unnecessary.

Reef fish tank decorations

1. Exotic Environments Caribbean Living Reef 

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If want to give your aquarium a more natural feel, this product is a must-have. The artificial reef looks like a tiny version of the real thing!

It’s usually available in the sizes mini (4 x 3.5 x 3.5 inches) and small (7.5 x 5.5  x 5.5 inches). Made from durable poly-resin, the one-piece construction is non-toxic and 100% safe for your fish. It’s ideal for both saltwater and freshwater tanks and its vibrant colors are hand-painted – making it rich both in color and detail.

Finally, your fish can take shelter and swim through its built-in holes, that divide the reef into chambers. They will also love it because it can create air bubbles if you attach an air stone and tubing to it. Colorful and lifelike, it’s certainly a valuable addition to any fish tank and will fit perfectly.


Volcano fish tank ornament

2. Uniclife Volcano Aquarium Ornament Kit 

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If basic decorations bore you and you prefer to experiment, divert your attention to this little volcano. Easy to set up, the eccentric aquatic ornament is perfect if you have children, plus it’s really fun to watch!

You can usually find it in two sizes: small (4.3 inches) and large (6 inches). Hand-painted and made from resin, it’s not only harmless to your fish, but also environmentally friendly. The volcano also comes with an air stone in the packaging.

After you set up all the provided equipment, the volcano creates the effect of an eruption – while the air stone will produce bubbles! The best part is the rotatable red LED light that it comes with. It creates the effect of flowing lava.

Tip: Turn the tank’s lights off for a dazzling light show!


SpongeBob Fish Tank Decoration

3. Nickelodeon’s SpongeBob SquarePants Pineapple House

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Let’s be honest, who doesn’t love SpongeBob? This aquarium ornament is ideal if you have children or just simply want to please your own inner child.

Its size is approximately 5.9 inches and it’s made from resin, so it should fit perfectly in almost any tank. When submerged, the house won’t float around because its base is sturdy enough. Creative and colorful, this decoration will brighten up every fish tank and certainly become the star centerpiece. Another pro is that it’s easy to clean – all you need to do is wipe it down.

Bring the cartoon to life at home by checking out and purchasing this iconic pineapple house from Bikini Bottom.

Glow in the dark fish tank decorations

4. Glow-in-the-dark gravel and pebble substrate 

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It isn’t easy to find fish tank decorations that are both useful and aesthetically pleasing. This substrate gives you the best of both worlds. It’s non-toxic and eco-friendly.

It comes in a 5-pound bag, with each pebble ranging from 0.12 to 0.25 inches, and it’s suitable for both saltwater and freshwater fish tanks. What makes this product stand out is its neon colors. The space-inspired pebbles are black and blue and coated with acrylic – and they glow in the dark! The substrate will especially look captivating under your tank’s light, because it’s fluorescent.

(Every species of fish has specific needs. Therefore, we recommend you do your research before purchasing this substrate. It might not be the right type for your fish. For example, certain fish tend to make nests out of their tank’s substrate – this specific kind isn’t suitable for that. The black and blue pebbles also visually change the color of your aquarium, which may be problematic to certain types of fish.)

Artificial plants fish tank decorations

5. Comsun Artificial Aquarium Plants 

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If you don’t like taking care of real plants, these makeshift plants are the decoration your fish tank needs! They’re surprisingly lifelike, easy to clean and we found them to be completely safe.

These artificial plants come in a wide range of colors, so you can mix and match them to your liking. You can also place them wherever you please in your tank. The best part is that they require zero maintenance – no lighting, fertilizers, food or upkeep.

Each set offers 10 plants. Made from safe plastic, they won’t endanger your fish or affect the levels of CO2 in the water. They also won’t introduce parasites or pests into your aquarium that could potentially be harmful for your fish!