The Anubias nana is a popular and hardy aquatic plant, prized for its ability to thrive under low light conditions with minimal care. This slow-growing species is native to the shaded rivers of West Africa, making it highly adaptable to many aquarium setups. While the plant is forgiving, its placement method is unusual compared to most aquatic vegetation and is necessary for its long-term survival. Understanding the plant’s structure and nutrient absorption is key to ensuring it flourishes.
Preparing the Plant for the Aquarium
Before securing the Anubias nana, a short preparation process is required to remove nursery materials. If the plant was purchased potted, gently remove it from the plastic pot and carefully strip away all surrounding rock wool or foam used for growing and shipping. Any ties, weights, or metal bands holding the plant together should also be cut and discarded.
Inspect the leaves for damage or algae growth and trim away any yellowed or bruised foliage using clean, sharp scissors. The roots can be trimmed down significantly, which encourages the plant to grow new, healthy anchor roots once placed in the tank. Handle the plant gently, being cautious not to damage the main thick stem.
Understanding the Rhizome
The thick, horizontal stem from which the leaves and roots sprout is known as the rhizome. This modified stem structure is the plant’s life support system, responsible for nutrient and oxygen absorption. The Anubias nana is an epiphyte, meaning it naturally grows attached to surfaces like rocks and driftwood, with its rhizome exposed to the water column.
The most frequent error leading to the plant’s demise is burying the rhizome in the substrate. If covered by sand or gravel, the rhizome will be deprived of oxygen and water flow, causing it to quickly rot in a process known as rhizome rot. The thin roots are designed to attach to surfaces or penetrate the substrate for stability, but the main rhizome must always remain above the substrate line.
Attaching to Hardscape
The most successful method for planting Anubias nana is to attach it directly to hardscape, such as driftwood or porous rock. Anchoring itself to these surfaces is the plant’s natural growth habit, which keeps the rhizome exposed to necessary oxygenated water flow. Over time, the plant will grow new roots that firmly grip the hardscape, permanently securing it in place.
Using Super Glue
One fast and clean method uses cyanoacrylate gel super glue, which is aquarium-safe once cured. Apply a small amount of the gel directly to the underside of the rhizome or the spot on the hardscape where the plant will sit. Press the plant firmly onto the surface for about ten seconds until the gel forms a secure bond. Use the gel formula, as the liquid type runs too easily and is difficult to control.
Tying Methods
Alternatively, a traditional method involves tying the plant to the hardscape with cotton thread or fine fishing line. Wrap the material gently around the rhizome and the hardscape several times, securing it with a double knot to prevent slippage. If cotton thread is used, it will naturally degrade and disappear after a few weeks, by which time the roots should be securely attached. Ensure the plant is positioned in an area with moderate water flow, which helps deliver nutrients and prevents algae from settling.
Anchoring in Substrate
While attaching to hardscape is preferred, it is possible to anchor Anubias nana directly into gravel or sand substrate using careful technique. This method suits hobbyists who do not use decorative hardscape or prefer the plant to remain on the aquarium floor. The fundamental rule remains that the rhizome must be positioned completely above the substrate line.
To achieve stability, the thin roots can be carefully inserted into the substrate without pulling the rhizome down. Another option is to use dedicated lead-free plant weights wrapped around the roots, burying the weight while leaving the rhizome exposed at the surface. Placing larger, smooth decorative rocks around the base can also help prevent the rhizome from sinking over time, ensuring proper oxygen exchange.