- Sku: AIO31G-TANK
Tideline AIO Lagoon Aquarium 31G
Tideline AIO Lagoon Aquarium 31G is a compact, all-in-one reef tank with built-in rear-chamber filtration, so everything hides behind the aquascape. The wide, shallow 31-gallon Lagoon shape spreads light across the sand bed and gives corals room to spread out, and the low-iron front and side panels keep the view crystal clear. It comes ready to run with a return pump, plumbing, a filter sock, and a leveling mat. Add a matching Artika cabinet stand, or run it on a stand you already own. Want more room? See the larger AIO 47G Lagoon, or browse all aquarium systems.
What’s Included
- AIO Lagoon tank: 31-gallon aquarium with built-in rear filtration chambers, 10mm automotive-grade glass, and low-iron front and side panels.
- Return pump: Tideline MY-15L, 250 GPH, to run the all-in-one filtration loop.
- Plumbing: return plumbing for the rear chamber.
- Filter sock: one 3 in x 5 in rectangular sock for mechanical filtration.
- Self-leveling mat: cushions and levels the tank on your stand.
A light, heater, and skimmer are not included, so you can spec the gear you prefer. Ask us to put a full reef package together.
Why the AIO Lagoon
- All-in-one filtration: roomy rear chambers hold your media, heater, and pump out of sight, so the display stays clean and open.
- Wide, shallow Lagoon shape: at 15.75 in tall, light reaches the whole sand bed, which is ideal for corals and a natural lagoon aquascape.
- Low-iron viewing: ultra-clear front and side panels show true coral color with none of the green tint of standard glass.
- 10mm automotive-grade glass: thick, high-clarity glass built to last.
- Compact footprint: at 24.5 in long, it fits where a bigger reef will not, and it fits any 24 x 18 stand.
Choose Your Stand
Pick a configuration from the drop-down above:
| Tank Only | The 31G Lagoon AIO and all accessories, no stand. Fits any 24 x 18 stand. |
| Artika Stand | Add a matching Tideline Artika cabinet in Black, Gray, Natural, or White. Furniture-grade, two-door, sized for the 31G Lagoon. |
Specifications
| Brand | Tideline Aquatics |
| Dimensions | 24.5 in L x 18.5 in W x 15.75 in H |
| Volume | 31 gallons |
| Glass | 10mm automotive-grade, low-iron front and side panels |
| Filtration | Built-in AIO rear chambers |
| Return pump | Tideline MY-15L, 250 GPH |
| Included | Pump, plumbing, 1 filter sock, self-leveling mat |
| Stand | Optional Artika (Black / Gray / Natural / White), fits 24 x 18 |
| Availability | Special order, in-store pickup |
Recommended Pairings
- Kessil AP9X: a reef LED to light the Lagoon (no light is included).
- CaribSea Ocean Direct: live marine sand to start the reef.
- Salt mixes: mix up saltwater for fills and water changes.
- Seachem HydroTote: haul RO/DI and saltwater for pickup and top-off.
- All aquarium systems: compare other reef-ready tanks.
FAQ
What is an AIO tank?
All-in-one. The filtration lives in built-in rear chambers instead of a separate sump under the tank, so you get clean, simple filtration without extra plumbing. Just add a light, heater, and media.
What comes in the box?
The tank, a Tideline MY-15L return pump (250 GPH), plumbing, one filter sock, and a self-leveling mat. A light, heater, and skimmer are not included.
Does it come with a stand?
Only if you choose an Artika stand option. The Tank Only option is the aquarium and accessories with no stand, and it fits any 24 x 18 stand.
How is it different from the 47G?
Same Lagoon shape and depth, but shorter front to back length at 24.5 in and 31 gallons, with a MY-15L 250 GPH pump. The 47G is 36.5 in long and 47 gallons.
How big is it?
24.5 in long, 18.5 in deep, 15.75 in tall, holding 31 gallons.
Have a question?
Tideline AIO Lagoon Aquarium 31G
