Tubes in Roblox Abyss are your lifeline. They control how much oxygen you carry, how deep you can dive before oxygen drains rapidly, how fast you move through the water, and how many kilograms of fish you can haul back to sell. Upgrading at the wrong time — or buying tubes you don't need — burns through cash that should go toward better guns or the next meaningful tube tier. The optimal path skips several tubes entirely and saves tens of thousands of dollars along the way.
Quick answer: The most efficient tube progression is Wooden Tube → Normal Tube → Pufferfish Tube → Boat Tube → Rukiry Tube → Oxy Tube → Lost Spirit Tube → Ruined Tube. Skip the Old Tube, Fire Tube, Zepline Tube, and Plane Tube.
What tube stats mean in Abyss
Every tube has four stats. Oxygen determines how long you can stay outside the safety dome before dying — the bar appears at the bottom-left of your screen. Max Depth is measured in meters and sets the threshold below which your oxygen starts draining at a punishing rate. Weight caps the total kilograms of fish you can carry at once, and exceeding it is impossible. Speed is your base movement rate in the ocean. Early on, prioritize oxygen so you can survive long enough to catch fish and complete quests. Weight becomes more important once you understand potions, oxygen pods, and artifact loadouts.
Artifacts, potions, and oxygen pods can all supplement your tube's stats. The Eternal Crystal artifact, for example, adds roughly 18 percent oxygen and 25 kg of carry weight but reduces damage output. For most of the mid-game, damage-boosting artifacts like the Rune of Might or Mutated Skull are more valuable because killing fish faster is how you earn money faster.
Recommended tube progression table
| Tube | Cost | Oxygen | Max Depth | Weight | Speed | Location |
|---|---|---|---|---|---|---|
| Wooden Tube | Free | 40 | 15 m | 5 kg | 20/s | Default at start |
| Normal Tube | $350 | 70 | 50 m | 25 kg | 20/s | David's Tube Shop (Forgotten Deep) |
| Pufferfish Tube | $2,850 | 110 | 180 m | 80 kg | 22/s | David's Tube Shop (Forgotten Deep) |
| Boat Tube | $5,250 | 130 | 275 m | 120 kg | 22/s | Ancient Sands, beside Marcus |
| Rukiry Tube | $40,500 | 180 | 460 m | 180 kg | 24/s | Ancient Sands, beside Grumpy Hank |
| Oxy Tube | $84,500 | 220 | 495 m | 250 kg | 28/s | Spirit Roots, beside Lumi |
| Lost Spirit Tube | $150,000 | 300 | 600 m | 370 kg | 30/s | Spirit Roots, beside Victor |
| Ruined Tube | $270,000 | 380 | 650 m | 480 kg | 32/s | Bob's Room (Forgotten Deep) |
Early game: Forgotten Deep tubes
You start with the Wooden Tube, which has barely enough oxygen to catch a few fish near the safety dome. Upgrade to the Normal Tube for $350 as soon as you can — it more than doubles your max depth and quintuples your carry weight. The Old Tube exists at $50, but the stat jump is so small that spending even that amount delays your path to the Normal Tube for almost no benefit.
After the Normal Tube, skip the Fire Tube ($1,500) and go straight for the Pufferfish Tube at $2,850. The Kraken questline will require you to buy the Pufferfish Tube anyway, and its 110 oxygen and 180 m max depth are enough to reach the Ancient Sands with an oxygen pod or two. The Fire Tube's 90 oxygen and 100 m depth cap make it a dead-end purchase that delays your real progression.
Mid game: Ancient Sands tubes
Once you have the Pufferfish Tube, head to the Ancient Sands. Your first priority here is the Boat Tube, sold by Marcus for $5,250. With 275 m max depth and 120 kg carry weight, the Boat Tube is arguably the most important single upgrade in the game. It opens up the entire Ancient Sands for comfortable fishing and lets you reach Crazy Jeff's shop deeper in the cavern. Many experienced players ride the Boat Tube all the way through the mid-game and even into Spirit Roots with oxygen pods, prioritizing gun upgrades over tube upgrades during this stretch.
The Zepline Tube is available in the Ancient Sands as well, but it sits in an awkward price-to-performance spot. Skip it and save for the Rukiry Tube at $40,500, found beside Grumpy Hank. The Rukiry Tube's 460 m max depth and 180 kg weight let you survive Spirit Roots depths and complete up to around 10 Diver quests. It's a meaningful jump that the Zepline Tube simply doesn't provide.
A key strategic point during the mid-game: after buying the Boat Tube, shift your spending toward guns. You can reach deeper areas with the Boat Tube and oxygen pods, but you won't be able to catch the fish there without enough damage. Upgrading from the Crossbow Gun to the Wasted Gun ($17,000, 120 damage) and then the Magroot Gun (190 damage) in the Ancient Sands cavern will accelerate your income far more than buying an intermediate tube.
Late game: Spirit Roots and beyond
When you arrive at Spirit Roots, the Rukiry Tube won't have enough max depth to comfortably reach all the quest NPCs deeper in the region. Pick up the Oxy Tube for $84,500 beside Lumi. This is a massive upgrade — 220 oxygen, 495 m depth, 250 kg weight, and 28/s speed. It transforms Spirit Roots from a dangerous oxygen-draining sprint into a manageable farming zone.
After the Oxy Tube, skip the Plane Tube entirely. Save for the Lost Spirit Tube at $150,000, sold beside Victor in the Spirit Root Hollow after you complete his questline. With 300 oxygen, 600 m depth, and 370 kg carry weight, the Lost Spirit Tube is the bridge to endgame content and lets you haul enormous loads of high-value fish back to sell in the Forgotten Deep.
The final tier offers two options inside Bob's Room in the Forgotten Deep. The Ruined Tube costs $270,000 and has the best oxygen (380) and speed (32/s) of any tube in the game, with 650 m depth and 480 kg weight. The Bath Tube costs $256,000 and trades oxygen and speed for a massive 600 kg carry weight at 27/s speed. For most players, the Ruined Tube is the better choice because higher oxygen and speed mean more efficient runs. The Bath Tube edges ahead only if you have access to the Angler's Cave or the Sell Anywhere gamepass, where the extra carry weight outweighs the slower speed.
Tubes to skip
- Old Tube ($50) — The stat increase over the free Wooden Tube is negligible. Save that cash for the Normal Tube.
- Fire Tube ($1,500) — The Pufferfish Tube costs only $1,350 more and is required for the Kraken questline. Buying the Fire Tube first is wasted money.
- Zepline Tube — Sits between the Boat Tube and Rukiry Tube without offering enough depth or weight to justify the cost. Go straight to the Rukiry Tube.
- Plane Tube — Outclassed by the Lost Spirit Tube in every meaningful stat. Save your cash for the bigger upgrade.
How to know your tube upgrade worked
After purchasing a new tube, equip it from your inventory. The oxygen bar at the bottom-left of your screen should immediately reflect the new capacity. You can also check your current max depth by watching the depth counter at the top of the screen as you dive — once you pass your tube's max depth threshold, a "Critical Depth" warning appears, and oxygen starts draining rapidly. If you see a higher threshold than before, the upgrade is active.
If your oxygen runs out completely while exploring, you die and lose 25 percent of both your inventory and your cash. Carrying too much fish also slows your movement speed, so keep an eye on your weight relative to your tube's limit. You physically cannot pick up fish beyond the cap.
The tube progression in Abyss rewards patience. Resist the urge to buy every available upgrade, focus your early and mid-game spending on guns to increase your damage output, and leap between the key tube tiers outlined above. You'll reach endgame content faster and with far more cash in your pocket.
