General information
CoraroC is a fully 3D-printed aquascaping system crafted from high-quality PETG (Polyethylene Terephthalate Glycol)for strength, durability, and reef safety. As your aquarium matures, CoraroC develops a natural, seamless look that blends beautifully with your corals.
Designed for flexibility and creativity, the CoraroC system allows you to move and reposition corals individually— perfect for fragging, trimming, or reshaping your aquascape. You can easily relocate a coral to achieve the ideal flow and lighting conditions or adjust your layout to match your evolving vision.
Even with heavy coralline growth, the structure remains easy to modify, giving you complete control over your reef’s design.
Easy Assembly — No Tools Needed
CoraroC parts are designed for simple, tool-free assembly. Just twist the pieces together by hand until they stop — a firm twist ensures a secure connection.
To disconnect two pieces, twist them in the opposite direction. If the connector (CO-100) remains seated in one part, simply press it inward with your thumb to release the lock.
⚠️ Important: Never use pliers or any other tools to loosen the connector. Hand assembly only — it’s designed to be strong, yet easy to handle safely.
Flexible Options — Build It Your Way
CoraroC is available as individual parts or complete kits, giving you the freedom to design your aquascape your way.
If you’re new to CoraroC, we recommend starting with one of our CoraboX kits, paired with a few foots or floating scape connectors for easy setup and creative flexibility.
The CoraroC system is lightweight by design, making it ideal for creating stunning floating aquascapes. When first placing the pieces in water, make sure to release trapped air through the built-in vent holes — simply roll each piece gently underwater to let the air escape.
For added stability, components such as the BR-100, SH-100, FC-100,and FV-100 can be filled with sand or reef cement to increase the weight at the base of your scape.
Floating Kits — Redefine Your Aquascape Design
Our CorafloaT kits (available in Nano and Medium sizes) are designed for rimless tanks with glass thicknesses between 5–19 mm. These versatile kits let you create floating or branching scapes that extend beautifully from the back or sides of your aquarium.
The CorafloaT system can also be used on the bottom of the tank, offering endless creative possibilities. You can hang the scape from the tank’s edge for a striking suspended look, or secure the same components to the wall or base using aquarium-safe adhesive.
Watch the video below to see how our floating scapes work in action and get inspired to build your own unique design.
Compatibility — CoraroC v1 and v2
CoraroC v2 is fully compatible with CoraroC v1. Using the COv1-100 connector, you can easily merge components from both versions for seamless integration.
Watch the video below to learn how to connect CoraroC v1 and v2 systems step by step.
When will CoraroC mature with coralline algae, pods and so on?
Maturation Time — Building a Healthy Biome
The maturation of your CoraroC system depends on your tank’s biome and overall husbandry practices.
As a general guide:
In a new tank using only CoraroC, full maturation typically takes 6–12 months.
When added to an established, mature tank, CoraroC will usually mature within 4–12 weeks.
Each CoraroC piece is designed with pod openings and an open internal structure, providing excellent surface area for biofilm growth both inside and out. If you choose to fill some pieces with sand, you can also gain the anaerobic filtration benefits that sand offers.
Here you can see a new BR-100 piece alongside another that has been maturing for about two months. Even at this early stage, coralline algae grow this visible, and the piece is already teeming with pods— a clear sign of healthy biological development.
Section of a mature CoraroC reef with a lot of different acros.
Why is CoraroC white?
CoraroC can be made in virtually any color, but over time it will naturally become covered by coralline algae and other growth, blending seamlessly into your reef.
The white color actually mimics fresh coral skeletons but also gives you better visibility and control during the maturation process — making it easy to observe each stage of development and track when coralline algae begins to grow.
While colored rock may appear more natural at first, it can make it harder to see and understand your tank’s biological progression as it matures.
Do I need tools to use CoraroC?
Assembly and Mounting
All CoraroC pieces are designed to be assembled by hand— no tools are required for connecting the parts. Simply twist the pieces together firmly until secure. A strong hand-tight connection ensures stability and reliability.
The FL-100 component is the only exception: when attaching it to a rimless tank, you’ll need a flathead screwdriver to adjust and secure the mount.
A flathead screwdriver can also be used to open or close the caps on the FC-100 and FV-100 units when filling them with sand or reef cement for added weight or stability.
Coral holders
All CoraroC coral holders are designed to fit directly into BR-80/100 and SH-80/100 branches. Over time, your corals and coralline algae will naturally encrust the holders, creating a seamless, natural appearance in your reef aquascape.
Coral Holder CHA-100
The CHA-100 is our favorite coral holder — no glue needed for most frags and corals! Its design works exceptionally well with branching SPS corals, including thin branches down to ~3 mm in diameter, such as Seriatopora and Acropora echinata. Simply tighten the screw for a secure mount.
For larger corals or branches 15–20 mm in diameter, such as Stylophora or Acropora robusta, simply skip the spacer. By trimming the foot, the CHA-100 is also perfect for tabletop corals like Acropora efflorescens or Acropora solitaryensis.
Mounting corals horizontally is also easy — a task that is normally challenging when using glue. Just be careful not to overtighten with corals that have softer skeletons (e.g., Montipora digitata) to avoid squeezing the foot.
The CHA-100 can also be used for soft corals like Sarcophyton and Sinularia.
Coral Holder CHB-100
The CHB-100 is ideal for encrusting corals like Montipora danae, Goniopora, and similar species, where forming a natural foot is difficult. For these corals, simply use speed glue, coral glue, or similar adhesives, just as you would on a standard frag plug.
Acropora tenius walt disney
mounted in coral holder CHA-100
Acropora prostata encrusting
on CHB-100 (glued frag)
Acropora growth on
coral holder CHA-100
Different acros on CoraroC
Acropora spathula on coral holder v1
New frag in coral holder CHA-100
starting to encrust
Acropora prostata encrusting
progress
Mini frag glued to CHB-100
Acropora subulata newly
mounted in CHA-100
Acropora spathula on coral holder v1 connection point really hard to see
Curing and cycling?
Ready to Use — No Curing Needed
CoraroC requires no curing— it can be placed directly into a new or established tank immediately.
There are many opinions on how to “cycle” a tank, and how to get a tank to mature. While there are several approaches that can lead to success, here we briefly outline the method we normally use.
Starting a New Tank with CoraroC
If using the FR holder glued to glass, allow the silicone to cure for at least one week before proceeding. Once your scape is complete, fill the tank with RO water and mix in the salt directly in the system.
To establish biology, add bacteria and some filter material (providing additional surface for bacterial colonization), such as zeolite or products like Aquaforest Life Bio Fil. If available, adding a few small pieces of clean live rock or rubble into the CoraroC scape can help speed up maturation.
We typically start adding corals on day 2 or 3 to encourage biological activity, followed by the clean-up crew between days 3–7. Fish are introduced last, from day 7 onward, starting with a few small individuals and gradually increasing in number and size to maintain nutrient balance with the maturing system.
This approach has proven highly effective — as long as fish are added slowly and the system isn’t overloaded too quickly.
Mature CoraroC v1 Pieces — Disassembled
Here we show mature CoraroC v1 pieces that have been disassembled after one year in a tank. Notice the clean surface of the connection points, demonstrating how well the system maintains its integrity over time, even with long-term biological growth.
Adding CoraroC to an Existing Tank
As with any reef tank, changes should be made carefully and with thoughtful planning. While CoraroC does not negatively impact water parameters, any adjustment in a reef system can have effects, so it’s best to proceed slowly and deliberately.
If you’re adding a single branch or small shelf, it’s usually fine to assemble the CoraroC pieces outside the tank and then place them into your existing scape.
For larger additions, such as replacing a significant portion of your aquascape, consider splitting the installation into two or three steps. The timing between steps depends on the current state of your reef and how it responds to changes. Another option is to add pieces in your sump, connecting them beforehand to prevent tube worms or other unwanted growth on the connection points.
To attach CoraroC to your existing rockwork, the FR-100 piece works exceptionally well. It can be glued with epoxy or reef cement, providing a secure anchor from which you can build your CoraroC branches. The FR-100 piece can also be glued directly to glass. For installations in a running tank, underwater glues (such as Orca or similar products) can be used safely.
Will CoraroC last over time?
Our very first CoraroC pieces from 2019 are still in use in our tanks. Even with slight design updates over the years, the original pieces continue to perform like new at the connection points and maintain a natural, seamless appearance in the aquascape.
Big acroporas on CoraroC
Section in the top is recently changed but to the right you have colonys of approx 40cm i diameter growing in CHA-100 coral holders.
CoraroC is a lightweight system— when first placed in water, the pieces may even float. After venting excess air and allowing a short adjustment period, the pieces reach a density close to water, enabling floating aquascapes attached to the back or side walls of your tank.
For added versatility, some CoraroC pieces can be filled with sand or reef cement to increase weight, which can be useful in new tanks with mostly small frags. When using our foots for gluing or connection to glass or rock, filling the pieces is not necessary.
Corals in the CoraroC system
Acropora spathula
Acropora awi
Acropora microclados SSC classic
Acropora turaki
Acropora tenius "Walt disney"
Acropora microclados SSC classic
