HOB or internal filter for a 60L planted tank?
You’re setting up a 60-litre planted tank and you’re torn between a HOB filter (hung on the back) and an internal filter (submerged in the tank)? Both work brilliantly at this volume. The right choice mostly comes down to your priority: easy maintenance, a discreet look, or control over the flow. Here’s how to decide.
The essentials — our pick. For a beginner’s 60L planted tank, the HOB (hang-on-back) filter is usually the most practical: simple maintenance, great oxygenation, zero footprint inside the tank. Go for the internal filter if you want adjustable flow, a very discreet setup, or a closed-lid tank. Either way, aim for a flow rate of 240 to 300 L/h (4–5× the volume).
The match-up at a glance
| Criteria | HOB filter | Internal filter |
|---|---|---|
| Footprint inside the tank | None (hangs on the back) | Takes up a submerged corner |
| Maintenance | Very easy (access from the top) | You have to lift it out of the tank |
| Oxygenation | Excellent (waterfall) | Decent |
| Adjustable flow | Limited | Often yes |
| Visual discretion | Visible at the back | Visible in the tank (can be hidden) |
| Noise | Waterfall sound if level drops | Generally silent |
| Tank with a closed lid | Less suitable | Suitable |
The HOB filter: the all-rounder
Hung on the back of the tank, it draws water up, runs it through its filter media, then returns it as a waterfall — which oxygenates the water beautifully.
- ✅ Dead-simple maintenance: open the lid, rinse the sponges, done.
- ✅ Takes up no space inside the tank (handy for planted/aquascaped setups).
- ✅ Excellent oxygenation thanks to the waterfall.
- ❌ Can make a waterfall sound if the water level drops.
- ❌ Less suitable if your tank has a perfectly sealed lid.
For a first 60L planted tank, this is our pick:
HOB filter ~300 L/h
Our pick- Dead-simple maintenance: rinse the sponges from the top
- Takes up no room inside the tank (ideal for planted setups)
- Excellent oxygenation thanks to the waterfall
Amazon affiliate link. Price and availability may change at any time.
The "waterfall noise" myth: it only happens when the water level drops and the fall gets taller. Keep your water level nice and high, close to the filter outlet, and the noise almost completely disappears.
The internal filter: the discreet, adjustable option
Fully submerged, it sticks into a corner with suction cups. Many models have an adjustable flow rate and a directional outlet.
- ✅ Quiet (underwater).
- ✅ Adjustable flow: handy for planted tanks or species that like calm water.
- ✅ Compatible with a sealed lid.
- ❌ Takes up space inside the tank.
- ❌ Maintenance is a little less convenient (you have to lift it out of the water).
If you’re after a clean aquascape, quiet running, or adjustable flow, this is the right alternative:
60L internal filter with adjustable flow
The most discreet- Adjustable flow, perfect for a planted tank
- Quiet because it's fully submerged
- Compatible with a sealed lid
Amazon affiliate link. Price and availability may change at any time.
The factor that really decides: flow rate
Whatever the type, the flow rate is what matters most. For a 60L, aim for 4 to 5 times the volume per hour, so 240 to 300 L/h. In a planted tank the lower end is plenty: plants and many fish prefer a moderate current.
Before you commit to your choice, run through these points:
- I've picked a flow rate of 240 to 300 L/h for my 60L
- HOB if I want the simplest maintenance and zero footprint
- Internal if I want adjustable flow / a closed-lid tank / quiet running
- I keep the water level high (kills the HOB waterfall noise)
- I plan to run it throughout the whole cycling period
For a first 60L planted tank, I recommend the HOB nine times out of ten: you reach the sponges in two seconds, you don't have to plunge your hands into the tank, and the oxygenation is top-notch. You move to an internal filter when you want a clean aquascape with nothing showing at the back.
Conclusion
HOB or internal, both filter a 60L planted tank perfectly. The HOB filter wins on maintenance simplicity and zero footprint; the internal filter wins on discretion, quiet running and adjustable flow. Pin down the flow rate (240–300 L/h) first, then choose based on your priority.
For shrimp tanks, the need is different: see “What filter flow for a shrimp tank?”. And to run your filter properly at start-up, “Should you run the filter before adding fish?”.
Frequently asked questions
HOB or internal filter, which one for a 60L planted tank?
For a beginner's 60L planted tank, a HOB (hang-on-back) filter is often the best choice: easy to clean, great oxygenation, and it takes up no space inside the tank. An internal filter is still a solid option if you want adjustable flow and a discreet setup, or for a tank with a closed lid.
What filter flow rate do I need for a 60-litre tank?
Aim for around 4 to 5 times the tank volume per hour, so 240 to 300 L/h for a 60L. In a planted tank you can stick to the lower end: plants like a moderate current, and too much flow stresses some species.
Is a HOB filter noisy?
The noise mostly comes from the waterfall when the level drops. Keep the water level high (close to the outlet) and maintain the pump, and a HOB stays quiet. An internal filter sits underwater, so it's generally quieter.
Does an internal filter eat into the usable tank volume?
Yes, slightly: it's submerged and takes up a few centimetres in one corner. On a 60L that stays marginal, but it's a point to consider for heavily planted or aquascaped tanks where every bit of space counts. A HOB hangs on the back and takes up no room in the water.
