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 Ballast Water Treatment Simplified


oneTANK, an ERMA FIRST company, treats ballast water within the vessel’s ballast tank and has no filters, ultra-violet lamps or electrolytic chlorine generators. Its footprint is only 600mm x 600mm, half the size of its nearest competitor. Its power consumption is similar to that of a household washing machine. With low-running costs and full regulatory complianceoneTANK provides a ballast water management solution which works in all water qualities and salinities.

oneTANK is an ideal solution for: Semi-Submersibles, Work Boats (Dredge/Tugs/OSVs),  Aft Peak Tanks, Fishing Vessels, & Yachts.

oneTANK is a small scale innovative, low-cost, IMO Revised G8 Code and United States Coast Guard compliant system. Also, its mixing technology is developed and patented by U.S. Geological Survey.

oneTANK Advantages

  • Smallest footprint

  • Simple installation & operation

  • Disinfect tank & pipes

  • NO filters, NO backflush pump, NO UV cleaning

  • NO E/C Hydrogen venting, NO transformer rectifiers, NO flow meters, NO control valves


oneTank Product Diagram

Operational Specifications

  • Salinity: Not Applicable
  • Water Temperature: Not Applicable
  • Hold Time: >24 Hours
  • Min. Average Total Residual Oxidant (TRO): 5 mg/L
  • Min. Concentration-Time (CT): 120 mg-hr/L
  • Power Consumption: 15 Amp 120 Volts, or 7.5 Amp 230 Volts


  • DNV GL Type Approved
  • IMO Revised BWM Code
  • U.S. Coast Guard

Support Services from ASR & oneTANK

  • Applications engineering
  • Installation and commissioning
  • Service and spare parts

    How can oneTANK help you?

    Click the brochures below to see specifics for each type of vessel.

    ASR proudly represents oneTANK, an ERMA FIRST company, ballast water treatment system.  Please contact our team for more information on how oneTANK BWTS can support your compliance goals.

    Let's Work Together

    Ready to get started or looking for more information about our solutions? Please contact us.