ReefDock
ShopEquipmentLivestockFAQ
  1. Home
  2. /Shop
  3. /Equipment
  4. /Cobalt MJ400

Cobalt MJ400

Cobalt Aquatics MJ400 in the Wavemakers category — compare current pricing across Bulk Reef Supply, Amazon, and other reef-supply retailers.

Some retailer links may earn ReefDock a small commission at no extra cost to you. Learn more.

Where to buy Cobalt MJ400

Best known price right now: $28.55 at Bulk Reef Supply. Prices are checked periodically and may change.

  • Bulk Reef Supply

    $28.55 (last checked)

    Search Bulk Reef Supply

  • Amazon

    Direct retailer link

    Buy on Amazon

  • Petco

    Search this retailer

    Search Petco

About Cobalt MJ400

MJ powerhead line entry.

Key facts

Mount
magnet_mount

Track this in Reef Trak

Reef Trak is the companion app — log every piece of equipment in your build, set replacement reminders, and import dosing schedules. ReefDock and Reef Trak share a single account. Track this on Reef Trak.

More from Cobalt Aquatics

Browse every Cobalt Aquatics reef product indexed on ReefDock with side-by-side retailer pricing.

See all Cobalt Aquatics products →

Related equipment

  • AI Nero 3

    AquaIllumination Nero 3

  • AI Nero 5

    AquaIllumination Nero 5

  • AI Nero 7

    AquaIllumination Nero 7

  • Aqamai KPM

    Aqamai KPM

  • Aqamai KPS

    Aqamai KPS

  • AQQA Double Head Aquarium Wave Maker

    AQQA Double Head Wave Maker

  • AQQA Magnetic Wave Maker 950GPH

    AQQA Magnetic Wave Maker 950GPH

  • AQQA Wave Maker 1056GPH

    AQQA Wave Maker 1056GPH

ReefDock

Reef-product search built by the maker of Reef Trak.

Questions? support@reeftrak.com

Shop

  • All reef products
  • Equipment
  • Livestock
  • Brands

Categories

  • Corals
  • Fish
  • Invertebrates
  • Equipment
  • Frags

About

  • Partners
  • About ReefDock
  • FAQ
  • ReefTrak integration
  • Affiliate disclosure

© 2026 ReefDock · Privacy · Terms