Best Aquarium Décor Ornaments of 2025

"I bought this for a 3-gallon tank, and while it's really too big for it, I still love it. It's colorful, detailed, and adorable. I plan to add glow-in-the-dark paint for my stepson's glowfish tank. I'm excited to test the movement action, but my only critique is that it is very light and needs to be weighed down with gravel."

"When I first had an aquarium as a child, this was one of my favorite decorative items. I bought another for my bigger aquarium. I made some modifications to improve its function and stability, like gluing it to a Plexiglass base with pebbles for weight. I hope my suggestions help others."

"I love how this looks in my tank! It does require some adjustments to stay down, but I simply added aquarium gravel inside the ship halves, and it worked perfectly."

"I absolutely love this little house. It's ideal for my terrarium, adding a pop of color to the tank. My gecko enjoys sunbathing and hiding in it. It's well-built, ensuring it won't break or lose color over time. The size is just right for my setup. 10/10!"

"The color is perfect and looks just like the photo. It seems durable, and the size fits my small tank very well. It's lightweight, making it easy to remove during cleaning. This little house really completes my tank. I was worried it might arrive broken, but it came intact and looks fantastic!"

"I bought this adorable mushroom house for my fish tank, and I love it so much that I ordered a second one for another tank. The instructions for prepping it were simple and easy to follow. It’s just so cute!"

"My betta fish loves this! He hides in it and pops his head out of the eye holes, which I find absolutely adorable. It fits perfectly in my 5-gal Aqueon Mini Bow with plenty of swimming space."

"I appreciate the durability and stability of this product. It stays at the bottom of my tank without floating up. The quality is excellent and matches perfectly with my SpongeBob pineapple house!"

"As a fan of SpongeBob, I hesitated to buy this for my aquarium, but it has a nice Easter Island Moai statue look that makes it acceptable. I did sand down the rough edges to ensure it's safe for my fish. So far, my Bloodfin Tetras seem to enjoy swimming by it!"

"I find it to be the perfect size for my small 1.5-gallon planted aquarium. It adds a nice touch beyond just plants and gravel."

"I also used this for a cake, and it fits perfectly with an under-the-sea theme. The turtle is realistic and beautifully painted! It stands well on its own and arrived in great packaging."

"I love this little turtle! It’s about 3 inches wide and high, making it a great addition to our fish tank. The colors are vibrant, and I’ve had it in for 3 months without any fading, so I’d say it’s quite durable!"

"I really love the look of this hide a rock. It's the perfect size for my fish, and they seem to enjoy it as well. It's also easy to clean and has no rough edges. I can definitely say it's high-quality."

"I wanted to give an update: none of my fish have perished after adding these to the tanks. My bettas adore them! I'm planning to buy another one. I have a dremel, so I was able to smooth the edges, but some edges were still sharp. I soaked them for a few days, and there were no changes in water parameters. They look great in the tanks, and I hope my fish continue to enjoy them!"

"This product was perfect for my betta! He loves it so much that he sleeps in it all the time. I appreciate that I can change the angles of how it sits, giving him a little variety. I would highly recommend this to anyone!"

"This is exactly as shown and described. It fits perfectly in my small tank, and the color is great—providing my Beta with a place to ‘hide'."

"Although I found it a bit smaller than I expected, I didn't check the dimensions before purchasing. Overall, it fits well in my tank."

"I had a small issue with the string being loose and the glue not holding the mast in place. I had to re-tie the string tighter, but it’s a nice-looking ship and my frogs enjoy hiding in it."

"I love how brightly it glows under blue LEDs! It's also a fraction of the price compared to pet stores, and I find it unique compared to other decorations I've seen."

"My large Cichlid absolutely adores these soft, colorful pieces! As long as they're soft and vibrant, she’s a happy fish, which makes me a happy fish mom!"

"I was really impressed by the vibrant colors whether under regular light or the glow light setting. It moves gently in the current, and the heavy base keeps it from tipping over."

"I have a smaller pond and large SA cichlids, so finding decor is tough. I bought this castle because I love other Penn Plex pieces. However, I envisioned it being bigger. At 10”, it feels small next to the 18” castle. My Convict fry might enjoy it, but I’m hesitant to spend more money when they have enough. This castle doesn’t provide the necessary protection for my large fish, so I’m returning it. It would be great for smaller fish like tetras or corys, but the archways are only ¾ of an inch wide. It's perfect for tiny fish but not worth it for my needs right now. If I had a smaller tank, it would be my top choice."

"I was looking for a nice castle with hiding spots for my bristlenose, and this castle is just right! After reading reviews, I sanded it down and blocked the deep areas with aquarium foam for safety. The quality is good, and the color is perfect! I recommend it, but a little prep work might be needed to ensure my fish are safe. Overall, it’s worth it!"

"I’m thrilled I found this double castle. Remember, it comes in two separate pieces, which is essential to know if you want the same look I have. It’s challenging to find large decorative items for big tanks, so this was a fantastic discovery! I added red LED lights and a bubbler from my previous aquarium design, and I think it looks amazing!"

"I found the product to have a natural look that enhances my tank's aesthetics. Its good weight keeps it stable, which I appreciate."

"This was exactly what I wanted for my Betta. I just had to glue the plants down after a few weeks, but they look realistic and fit perfectly in my 5-gallon tank."

"I had to return this since it was smaller than I thought, but it was such a cute piece. If it had fit, I would have definitely kept it."

"I find this tree beautiful in my tank. It's heavy enough that it doesn't float, and the leaves sway peacefully in the water. The orange color is light and bright, with darker spots, and it's a great size for the price. I rinsed it well before placing it in my tank, and there was no color bleed. I'm very happy with my purchase!"

"I bought this tree for my kids' 10-gallon aquarium. While it looked nice from a distance, I did notice some minor issues. The tree was packed in a box that was too small, causing some branches to be a bit bent. The colors also weren't quite what I expected, but overall, it adds a decent touch to the tank."

"Initially, I had low expectations based on other reviews, but I was pleasantly surprised by the quality. The rock is heavy, and the leaves are sturdy. I found very few hot glue strings that were easy to fix with a scrub. For the price, it's really quite pretty!"