30 Best Aquarium 3D Prints – STL Files
Reading Time: 11 minutes For aquarium enthusiasts, there are a lot of great models that can be 3D printed, some will serve as decoration while others will help you out with the more technical part of owning a fish tank.
I wrote this article to compile a list of the 30 Best Aquarium 3D Prints. They are all free to download, so go ahead and grab the ones you like.
1. Hose Clamp
Anyone who owns aquariums and fish tanks knows the importance of being able to seal any tube you have to control liquid flow.
That’s why this Hose Clamp model is extremely useful, besides being such an easy print to make.
- Created by Frontier3D
- Number of downloads: 40,000+
- You can find the Hose Clamp at Thingiverse.
2. Rock Formations
For people looking to improve their aquarium’s decoration, this awesome Rock Formations model is perfect.
All the rocks are hallow, and you can scale them down as much as you want to fit the size of your fish tank.
- Created by Terrain4Print
- Number of downloads: 54,000+
- You can find the Rock Formations at Thingiverse.
3. Aquarium Flow
Aquarium Flow is just a pretty name for the Random Turbulent Flow Generator, which will generate an improved water flow for your aquarium.
This will significantly improve the health of the environment.
- Created by Cleven
- Number of downloads: 35,000+
- You can find the Aquarium Flow at Thingiverse.
Check out the video below to see how the Aquarium Flow was created.
4. Three Gyroid Sculptures
One of the most modern and elegant decorations for any aquarium is the Three Gyroid Sculptures model.
They are quite detailed and still offer plenty of space for the fishes to swim through.
- Created by DaveMakesStuff
- Number of downloads: 3,000+
- You can find the Three Gyroid Sculptures at Thingiverse.
Check out the video below to see how the Three Gyroid Sculptures looks after printing.
5. Aquarium Guard Tower
This Aquarium Guard Tower is another awesome decoration that will really set apart your aquarium from all the others.
Just be aware that you should glue all the parts together, or they may float apart until being fully filled with water.
- Created by J_Tonkin
- Number of downloads: 16,000+
- You can find the Aquarium Guard Tower at Thingiverse.
6. 10 Gallon Aquaponics System
Here is a great option for anyone who likes to double their aquarium into a water-based plant growing system.
The 10 Gallon Aquaponics System model allows you to do just that while still creating a healthy environment where the fish and the plants will be able to stay.
- Created by Theo1001
- Number of downloads: 6,000+
- You can find the 10 Gallon Aquaponics System at Thingiverse.
7. Aquarium Pipework
For those who are into steampunk or shipwreck inspired designs, this Aquarium Pipework will be perfect decoration.
It is recommended you print it with ABS, and it can serve as a nice gift for anyone who wants to change the look of their fish tank.
- Created by MrBigTong
- Number of downloads: 23,000+
- You can find the Aquarium Pipework at Thingiverse.
Check out the video below to see the printed Aquarium Pipework installed and underwater.
8. Simple Aquarium Cave
This Simple Aquarium Cave is one of the most downloaded aquarium STL files as it features a very basic cave with little texture, perfect for any aquarium.
Users recommend printing this model using an aquarium safe plastic, such as ABS.
- Created by Mitchell_C
- Number of downloads: 18,000+
- You can find the Simple Aquarium Cave at Thingiverse.
9. Aquarium Bubbler
Check out this awesome Aquarium Bubbler, which will highly improve your fish tank’s water flow.
This model is a really nice upgrade to any sort of aquarium, especially one with a large quantity of water.
- Created by Tomonori
- Number of downloads: 10,000+
- You can find the Aquarium Bubbler at Thingiverse.
10. Shrimp Tube
For those who besides fish also own shrimp and other similar species in their aquarium, this Shrimp Tube will be perfect.
It provides a nice breeding space while still serving as decoration for the fish tank.
- Created by fongoose
- Number of downloads: 12,000+
- You can find the Shrimp Tube at Thingiverse.
11. Wood Textured Branch Stick Cave
Many users downloaded and decorated their aquariums with the Wood Textured Branching Stick Cave model.
With many different points of entrance for the fishes, this model offers not only a nice decoration as a great addition to their environment.
- Created by Psychotic_Chimp
- Number of downloads: 8,000+
- You can find the Wood Textured Branching Stick Cave at Thingiverse.
12. Sea Mine with Chain
If you’re looking for a more serious decoration, then you may really like this Sea Mine with Chain model that’s available to download.
The model comes in two parts, the chain and the sea mine. It is recommended you print around ten chain pieces for one sea mine.
- Created by 19LoFi90
- Number of downloads: 4,000+
- You can find the Sea Mine with Chain at Thingiverse.
13. Textured Rock Cave
Another great option of functional decoration for your aquarium is this Textured Rock Cave model, where your fishes can hide inside while still making the tank look nicer.
It is recommended you print this model with PETG, which is aquarium safe and a natural filament, so there will be no dyes or additives that can harm the animals.
- Created by timmy_d3
- Number of downloads: 5,000+
- You can find the Textured Rock Cave at Thingiverse
14. Automatic Fish Feeder
For anyone looking for a way to ease the need to daily feed your fish, this Automatic Fish Feeder model will be perfect for you.
Just be aware that you’ll need a 9g Micro Servo to make the model fully functional. They are available at Amazon for great prices.
- Created by pcunha
- Number of downloads: 11,000+
- You can find the Automatic Fish Feeder at Thingiverse.
Check out the video below to see the more about the Automatic Fish Feeder.
15. Aquarium Airline Holder/Separator
Aquarium air lines may be organized and secured with the help of this Aquarium Airline Holder/Separator model, which has a mounting hole in the middle.
It is one of the easiest and quickest 3D prints for aquariums that you can find online.
- Created by MS3FGX
- Number of downloads: 3,000+
- You can find the Aquarium Airline Holder/Separator at Thingiverse.
16. Hideout Rock
This Hideout Rock model is another great model to be 3D printed for any aquarium or fish tank that wants to improve its ambient.
While it features a lot of room for plenty of fish to hide, it also looks pretty nice, doubling as a great decorative piece.
- Created by myersma48
- Number of downloads: 7,000+
- You can find the Hideout Rock at Thingiverse.
17. Fish Floating Feeder
Another really cool and helpful model that you can 3D print for your aquarium is the Fish Floating Feeder.
With it, you will be able to fish your feed more easily and have a better distribution of food among them.
- Created by HonzaSima
- Number of downloads: 9,000+
- You can find the Fish Floating Feeder at Thingiverse.
18. Floating Castle
This is one of the best looking decorations for aquariums that you will find online. The Floating Castle model will make any fish tank look a lot prettier after its inclusion.
It will make a great gift for anyone who wants to get a new decoration for their aquarium.
- Created by mehdals
- Number of downloads: 3,000+
- You can find the Floating Castle at Thingiverse.
19. Glass Scraper
Many users have found great help with this Glass Scraper model, which is an easy and quick print and will help you to get rid of any algae that’s sticking to the glass.
Just be aware that you’ll need to get a stanley blade to be able to assemble the model correctly.
- Created by wattsie
- Number of downloads: 5,000+
- You can find the Glass Scraper at Thingiverse.
20. Sand Flattener
Another great model that will help you with your aquarium’s maintenance is the Sand Flattener.
This model will really make it a lot easier to fix imperfections and equally spread sand among the bottom of your aquarium.
- Created by luc_e
- Number of downloads: 4,000+
- You can find the Sand Flattener at Thingiverse.
21. Textured Sedimentary Stonewall
Nothing will improve the look of your aquarium as much as 3D printing this background, the Textured Sedimentary Stonewall model.
Printing this model is easy and doesn’t need supports. You may print as many panels as needed to fit your aquarium.
- Created by Psychotic_Chimp
- Number of downloads: 5,000+
- You can find the Textured Sedimentary Stonewall at Thingiverse.
22. No Fishing
In case you’re afraid someone may look at your aquarium and start having bad ideas, this No Fishing model will be perfect for you.
Many users recommend this model as it features a very creative design and is very easy and quick to print.
- Created by buzzerco
- Number of downloads: 2,000+
- You can find the No Fishing at Thingiverse.
23. Lotus Flower with Leaves
If you’re looking for a more elegant decoration for your aquarium, then this Lotus Flower with leaves may be the model for you.
You should print this model at 20% infill or less so all of its parts will swim accordingly.
- Created by guppyk
- Number of downloads: 1,000+
- You can find the Lotus Flower with Leaves at Thingiverse.
24. Plant Fixation
In case you’re having problems fixating the plants on your aquarium, this model will be very helpful.
The Plant Fixation model will serve as a nice decoration for your fish tank, while also helping you keep all your plants fixated nicely.
- Created by KronBjorn
- Number of downloads: 4,000+
- You can find the Plant Fixation at Thingiverse.
25. Squidward House
For any Sponge Bob fans out there that also own an aquarium, this Squidward House model will be a great gift.
It serves as an amazing piece of decoration for your fish tank while still having space for the fish to play around and inside it.
- Created by machadoleonardo
- Number of downloads: 8,000+
- You can find the Squidward House at Thingiverse.
26. Shrimp Cube
If you’re also a shrimp owner and want to provide a new hiding place for them, then this Shrimp Cube model will help you out.
You can print as many as you like and place them around a pile or in different spots of your aquarium.
- Created by droodles
- Number of downloads: 2,000+
- You can find the Shrimp cube at Thingiverse.
27. Hydroponic Aquarium Plant Hanger
For people looking to try a little bit of hydroponic gardening with the help of their aquariums, the Hydroponic Aquarium Plant Hanger is the perfect model.
This model is perfect for anyone that wants to start small and test just a few little plants on their fish tank.
- Created by Changc22
- Number of downloads: 2,000+
- You can find the Hydroponic Aquarium Plant Hanger at Thingiverse.
28. Test Kit
When owning an aquarium you’ll need to do several tests, such as pH or Nitrate tests. This model features better containers for the chemicals you’ll be using, so you’re able to these tests regularly.
The Test Kit model will really improve the routine of any one taking care of their aquarium. The kit comes with test tubes and a bottle holder.
29. Fan Coral
Another great piece of decoration that you can 3D print for your aquarium is the Fan Coral model.
This model was designed after a 3D scan of a real Fan Coral. It will really improve the look of any aquarium out there.
30. Flaming Stunt Hoop
If you’re really looking to impress everyone with the look of your fish tank, then these Flaming Stunt Hoops model will be perfect.
Everyone will be amazed by the fishes jumping through the hoops. This is definitely one of the most fun decorations out there.
- Created by jgoss
- Number of downloads: 1,000+
- You can find the Flaming Stunt Hoop at Thingiverse.
