The Aqua Ultraviolet Classic 57W UV Sterilizer delivers powerful UV-C water treatment in a compact inline design, making it an excellent choice for medium to large saltwater and freshwater aquarium systems.

Designed to help control free-floating algae and waterborne microorganisms, the Classic 57W supports improved water clarity while maintaining a relatively compact footprint.

With a 20-inch overall length and a saltwater aquarium capacity of up to 355 gallons, this model offers substantial water treatment capability without requiring the extended installation space of some longer UV sterilizers.

Key Features

• Genuine Aqua Ultraviolet Classic Series UV sterilizer

• Powerful 57-watt UV-C lamp

• Suitable for saltwater and freshwater aquarium systems

• Helps control free-floating algae and waterborne microorganisms

• Compact 20-inch inline design

• White housing with 3/4" inlet and outlet

• Non-Wiper model

• Made in the USA

Specifications

• Brand: Aqua Ultraviolet

• Model: Classic 57W

• Manufacturer Part Number: A00058

• UPC: 617750000589

• UV Lamp Wattage: 57W

• Housing Color: White

• Inlet/Outlet: 3/4"

• Dimensions: 20" L × 3.75" W × 6" H

• Saltwater Aquarium Capacity: Up to 355 gallons

• Freshwater Sterilization Capacity: 1,500–3,000 gallons

• Freshwater Pond Clarification Capacity: Up to 6,500 gallons

• Power Supply: 120V / 60Hz

• Number of UV Lamps: 1

Recommended Flow Rates

The Classic 57W supports different UV exposure levels depending on the actual water flow through the unit.

For reef aquarium applications, Aqua Ultraviolet recommends referring to the 30,000–45,000 UV dose range.

For applications requiring higher UV exposure, lower flow rates may be appropriate.

What's Included

• 1 × Aqua Ultraviolet Classic 57W UV Sterilizer

• 1 × 57W Classic Power Transformer

• 1 × 57W UV Lamp

• 2 × 3/4" Barb Fittings

Please Note: Water pump, tubing, and additional plumbing accessories are not included.

Installation Note

The Classic 57W is designed for inline installation into a compatible aquarium filtration system.

Its compact 20-inch housing makes it an attractive option where installation space is limited.

Allow adequate clearance for plumbing connections, lamp replacement, and maintenance.

Maintenance

UV lamps gradually lose effective UV-C output over time, even when they continue to illuminate.

Replace the UV lamp according to the manufacturer's recommended maintenance schedule and periodically inspect and clean the quartz sleeve.

Compatible Replacement Lamp: Aqua Ultraviolet Classic 57W Replacement UV Lamp (A20057).

Important Information

• This listing is for the White, 3/4" Inlet/Outlet, Non-Wiper model.

• UV treatment only affects water passing through the unit.

• UV sterilization is not a substitute for proper aquarium maintenance, filtration, or disease treatment.

• Always disconnect power before servicing the unit.

Replacement UV Lamp

Keep your Aqua Ultraviolet Classic 57W UV Sterilizer performing at its best with a compatible replacement UV lamp.

Need a replacement bulb? Shop the Aqua Ultraviolet Classic 57W Replacement UV Lamp.