Description
Product Overview
The Ultum Nature Systems Sigma Aquarium Water Pump is a compact, fully submersible water circulation pump engineered for energy-efficient water movement in aquariums, paludariums, and all-in-one (AIO) tank setups. Let us be honest, nothing triggers stubborn algae outbreaks or starves aquatic plants faster than dead spots with sluggish circulation. Designed with a sleek, low-profile footprint, the UNS Sigma operates quietly beneath the water line without disrupting your aquascape’s visual focus.
Key Features & Benefits
Fully Submersible & Ultra-Quiet: Submerged motor design dampens operational vibration for whisper-quiet performance in home offices and living rooms.
Low-Voltage Energy Efficiency: Powered by energy-saving USB/DC power supplies to minimize power consumption while maintaining reliable, continuous flow.
Customizable Adjustable Flow Rate: Integrated flow control dial allows you to tailor output velocity specifically for delicate nano shrimp or high-demand planted aquascapes.
Eliminates Stagnant Dead Zones: Boosts overall tank turnover to ensure even distribution of dissolved CO2, heat, and liquid fertilizers throughout the entire water column.
Substantial Head Height & Lift: High-performance impeller design delivers impressive vertical lift capability for paludarium waterfalls and internal filter sumps.
IPX8 Waterproof Submersion Rating: Certified for continuous submersed operation in both freshwater planted aquascapes and marine environments.
Technical Specifications
Always verify your specific UNS tank model compatibility and hose barb diameter requirements prior to selecting a pump size.
Model Variant
Dimensions (L x W x H)
Max Flow Rate
Max Lift (Head)
Power Specs
Outflow Barb Sizes
UNS System Compatibility
Sigma 5
1.96 x 1.96 x 1.85 in
79 GPH
2.6 ft
DC 5V / 5W
3/8 in, 1/2 in
UNS Foresta 35E, 30A White
Sigma 10
1.77 x 2.63 x 2.87 in
158.5 GPH
3.6 ft
DC 12V / 10W
3/8 in, 1/2 in
UNS Dual AIO 30A, Dual AIO 45A, Foresta 60E
Sigma 15
2.00 x 2.95 x 3.74 in
237.8 GPH
5.2 ft
DC 12V / 15W
1/2 in
UNS Dual AIO 35A, Dual AIO 40A, Dual AIO 90LA
Sigma 20
2.44 x 3.93 x 4.13 in
396 GPH
8.2 ft
DC 12V / 20W
1/2 in, 5/8 in
UNS Dual AIO 60A, Foresta PHS 174
What’s Included
1x UNS Sigma Aquarium Water Pump Assembly
Frequently Asked Questions
1. How does proper water flow from a pump help control algae?
Good circulation eliminates stagnant pockets where organic detritus and excess nutrients accumulate. Pushing water evenly ensures CO2 and nutrients reach all aquatic plants efficiently, fueling healthy plant growth that outcompetes algae.
2. How do I clean and maintain my UNS Sigma Water Pump?
Unplug the pump, disconnect the outflow hose, and pull off the front intake faceplate to access the magnetic impeller assembly. Rinse the rotor shaft and motor well with clean water every 2 to 3 months to remove trapped biofilm and mineral scale.
