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TankRig

Coral Frag Racks

Flat plates with 6, 12, 24, or 40 holes that hold coral frag plugs upright by their stems. Cut for a 9.525mm (3/8 inch) stem. Hang one on the rim or stand it on the tank floor.

A frag rack is a flat plate with holes in it. Each hole takes the stem of a coral frag plug, so the plug stands up on the plate. Our holes are cut at 10.125mm, made for the 9.525mm (3/8 inch) plug stem. Pick the magnet version to hold it on the glass, with its disc magnets fitted and included, the rim hook version to hang it on the tank wall, or the standoff version to stand it on the tank floor.

Frag rack questions, straight answers.

How many holes should I order, 6, 12, 24, or 40?

Match the hole count to how many frags you want to hold at once. A bigger rack holds more frags but takes up more space on the glass, the rim, or the tank floor.

Will my frag plug fit the 10.125mm hole?

The default holes are cut for a 9.525mm (3/8 inch) stem, the most common size. Brands publish stems from 9.0mm to 11.113mm (7/16 inch), and our frag rack guide lists which brand uses which.

Should I pick the magnet, rim hook, or standoff mount?

Pick the magnet version to hold the rack against the glass, with its disc magnets fitted and included. Pick the rim hook version to hang it on the tank wall, or the standoff version to stand it on the tank floor.

What if my frag plugs are a different stem size?

There is no standard size for a frag plug stem across brands, so we cut holes in 9mm, 9.525mm, 10mm, 11.113mm, and a 13.30mm universal. Our frag rack guide lists the stem size each brand publishes.

Do the holes hold the plug at an angle or straight up?

Each hole takes the stem of a plug so it stands upright on the plate. That keeps the coral facing up rather than leaning.

FROM OUR GUIDES

Coral Frag Rack Sizing Chart: Plug Stem Sizes by Brand, Hole Sizes, and Mounts

Frag plug stems come in four published sizes, not one. Find your plug brand, get the hole size, then pick a magnet, rim hook, or standoff rack.

Read the guide

Stand your frags up where you can see them.

Pick your hole count and mount style. Printed to order in the USA.

Need a size we do not stock? Use the custom builder.