Aqua One Ocellaris 400 Canister Filter – 400L/hr
The Aqua One Ocellaris 400 is a compact external canister filter designed for smaller aquariums up to approximately 100 litres.
With a flow rate of 400L/hr and 2.5 litres of filter volume, it gives smaller tanks the advantages of external filtration without taking up valuable space inside the aquarium.
It comes supplied with mechanical and biological filter media, making it a great option for tropical, coldwater and smaller marine aquariums where you want clean presentation and flexible filtration.
Why Choose the Ocellaris 400?
The biggest advantage of the Ocellaris 400 is its compact size.
Instead of having a bulky internal filter sitting inside the aquarium, the Ocellaris 400 is placed externally, keeping the tank interior clean and uncluttered.
| Specification | Value |
|---|---|
| Flow Rate | 400L/hr |
| Filter Volume | 2.5L |
| Compatible Tank Size | Up to 100L |
| Filter Media Included | Mechanical and Biological |
FAQ
What types of aquariums is the Ocellaris 400 suitable for?
The Ocellaris 400 is suitable for tropical, coldwater, and smaller marine aquariums up to 100 litres.
Does the filter come with all necessary media?
Yes, the filter comes supplied with both mechanical and biological filter media.
Can this filter be used in a 50-litre tank?
Yes, it is designed for tanks up to 100 litres, so a 50-litre tank is well within its recommended range.

Brandon Marshall –
I installed the Ocellaris 400 in my 60-litre tank and noticed a big improvement in water clarity within a week. The compact design fits neatly behind the tank without blocking visibility. The included media works well for both mechanical and biological filtration. Easy to clean and maintain.
Adam Greene –
It fits perfectly in my small aquarium setup. The flow rate is sufficient for my community fish. I appreciate that it doesn’t take up space inside the tank. The filter media is effective and the filter runs quietly.
Adam Chapman –
Great value for a small tank. It handles the water flow well and keeps the water clean. I’ve had it for three months and haven’t needed to replace any media. Works smoothly with my coldwater fish.