One of the biggest decisions when starting a new aquarium is whether to build a freshwater aquascape or a saltwater reef system. Both are rewarding in their own way, but they differ in terms of livestock, equipment, and maintenance needs.
The Ultum Nature Systems Dual All-In-One Aquarium makes this choice easier by offering a dual-use design — a rimless glass tank with a built-in triple-chamber filtration system that works for either environment. In this guide, we’ll explore the key differences between freshwater and saltwater setups, and how to choose the right UNS Dual AIO for your goals.
Freshwater Aquascaping with the Dual AIO
Freshwater setups are the most common starting point for aquarists. With a UNS Dual AIO aquarium, creating a planted tank is simple thanks to its hidden filtration system and premium low-iron glass.
Advantages of Freshwater Setups
- Beginner-friendly – Easier to set up and maintain.
- Affordable – Lower initial equipment and livestock costs.
- Plant Variety – From mosses and ferns to carpeting plants like Monte Carlo, freshwater aquascaping offers endless creativity.
- Livestock Options – Tetras, rasboras, shrimp, and bettas thrive in smaller AIO models.
What You’ll Need
- Nutrient-rich substrate for plant growth.
- LED lighting designed for aquascaping.
- Optional CO₂ system for advanced plant growth.
The UNS Dual AIO’s triple-chamber filter provides mechanical, biological, and chemical filtration, keeping water clean and plants healthy without bulky external equipment.
Saltwater Nano Reef with the Dual AIO
For aquarists looking for something more exotic, saltwater setups bring the colour and beauty of the ocean into your home. The UNS Dual AIO can easily be converted into a nano reef tank with the right accessories.
Advantages of Saltwater Setups
- Coral Beauty – Soft corals, LPS, and SPS add movement and vibrant colour.
- Exotic Fish – Clownfish, gobies, and firefish thrive in smaller reef tanks.
- Customisation – Reef systems can be tailored with refugiums, skimmers, and filter sock conversions.
What You’ll Need
- Aragonite sand and live rock for biological filtration.
- Salt mix and refractometer to maintain proper salinity.
- Protein skimmer or filter sock conversion kit for advanced filtration.
- High-intensity reef lighting to support coral growth.
The UNS AIO’s rear chambers are versatile enough to accommodate refugium modules, skimmers, and auto top-off systems — making reef keeping more accessible than ever.
Which Setup Is Right for You?
- Choose Freshwater if you want a low-maintenance, beginner-friendly system with a wide range of affordable plants and fish. It’s ideal for aquascaping and creating natural landscapes.
- Choose Saltwater if you’re ready for a more advanced, colourful, and exotic setup. Reef tanks require more care but reward you with vibrant corals and unique marine life.
The great thing about the UNS Dual All-In-One Aquarium is its flexibility. You can start with a freshwater aquascape, and later, if you want a challenge, transition to a saltwater reef using the same tank with different accessories.
Final Thoughts
Whether you’re drawn to the tranquil beauty of a planted freshwater tank or the vibrant energy of a saltwater reef, the Ultum Nature Systems Dual AIO series is built to support your vision. With sizes from 7 gallons to 21 gallons and a dual-use design, these aquariums are perfect for beginners and advanced aquarists alike.
At Charterhouse Aquatics UK, we stock the full range of UNS Dual All-In-One Aquariums along with accessories and upgrades to help you succeed in both freshwater and saltwater setups.
