Reef Rax

Grey Large Shelf Magnetic Frag Rack

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Discontinued by Bulk Reef Supply
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The Large Shelf Rack has ample space for your frags, with 20 pre-drilled holes spaced over this 10" shelf rock. With upsized magnets, this shelf rack can hold securely on tanks up to 1/2 inch thick. As with all other Reef Rax magentic frag racks, they use coated magnets to safely mount to your acrylic or glass aquarium and can be places almost anywhere in your aquarium to blend with your natural aquascape while adding a unique floating rock aesthetic.



  • No curing required
  • Doesn't leach
  • Coated reef-safe magnets
  • Multiple colors and shapes


Traditional coral frag holders are designed for frag tanks and made of egg crate, and if you ever put one in your display tank, you know they are an instant eyesore. Reef Rax has produced custom molds that simulate real live rock structures and textures at a fraction of the weight. 


Reef Rax Large Shelf is made of a highly porous resin structure that is almost buoyant when it is first placed in your tank. The neutral buoyancy greatly helps with its ability to hold heavy frag plugs and large frags of coral. Each rack includes reef safe magnets that can support the Large Shelf on tanks up to 1/2" thick.


Large Shelf

Reef Rax's Large Shelf was designed to be placed anywhere in a display tank without looking like a man-made object. It can be placed creatively anywhere on your glass for optimal coral light and flow, while creating a visually pleasing display.


Grey Color

Reef Rax custom grey coloration resembles dry live rock and is the perfect addition to any new aquascape. Over time coralline algae will encrust the rack creating beautiful purple hues, matching the rest of your aquascape. The resin that is used to produce Reef Rax is colored all the way through and will not change color if it is chipped or cracked. If your current tank already has coralline encrusted rock, we suggest using the Purple Reef Rax.



  • Dimensions: 10"L x 5.625"W x 6.5"H (at glass)
  • Frag Hole Size: 0.45" diameter
  • Number of Holes: 20
  • Max Tank Thickness: 1/2"


What's Included?

1x Reef Rax Large Shelf Frag Rack

2x Magnet Assemblies

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