two packages of coral frag plugs and two sets of magnetic frag rocks

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Natural Appearance

Too many frag substrates look like glaring white circles under the coral. Our substrates are poured to look natural and entirely unique.

Intentional Design

Every substrate design we release is reworked until it suits coral attachment perfectly while allowing you to place corals exactly where you want them.

Reef-Friendly Minerals

We use the minerals corals love in the wild to create our substrates to provide a balanced and predictable environment for your corals.

All plugs are not created equal.

Corals need substrates with porous surfaces, proper mineral composition, & chemical stability.

All of our substrates at Artisan Frag Plugs are designed around coral growth & happiness. We use a proprietary blend of aragonite, crushed coral, and silica sand that mimics the natural texture and chemistry of real reef rock to create the perfect substrate for healthy corals.

Order Frag Plugs
texture comparison image of aragonite frag plug
white ceramic frag plug close up comparison

Frequently asked questions

Do frag plugs need to be cured before use?

No. Our frag plugs are fully cured and ready for reef aquarium use. Each batch undergoes an extended curing process to minimize alkalinity leaching and provide a stable surface for coral attachment and growth.
What corals can be mounted on frag plugs?

Frag plugs are suitable for nearly all coral types, including SPS, LPS, soft corals, zoanthids, mushrooms, and encrusting species. Their textured surface helps coral tissue and coral glue bond securely while encouraging natural encrustation over time.
Why choose aragonite frag plugs over standard cement or ceramic plugs?

Aragonite frag plugs more closely resemble natural reef substrate and provide a realistic texture that many corals readily encrust. The added surface complexity can improve aesthetics in reef displays while helping frags transition more naturally into rockwork. The natural patterns of aragonite frag plugs also tend encourage natural encrustation patterns in coral frags.
What is the return policy?

We accept returns and exchanges within specific guidelines designed to maintain the quality and biological safety of our products.

  • Returns must be initiated within 45 days of delivery
  • Items must be unused and returned in original packaging
  • Customers are responsible for return shipping unless the item arrived damaged or incorrect
  • Approved refunds are issued to the original payment method after inspection
  • Original shipping costs are non-refundable

Damaged or Incorrect Orders

If your order arrives damaged or incorrect, please contact us within 7 days of delivery and include:

  • A clear photo of the issue
  • Your order information

Once reviewed, we may provide:

  • A replacement shipment
  • Store credit
  • A refund when appropriate

Approved refunds may take several business days to fully process after the return is received.
How much does shipping cost?

Shipping is calculated based on your location and the items in your order, with free shipping on orders over $20. You will always know the shipping price before you purchase.