Micranthemum callitrichoides aka Hemianthus callitrichoides (HC)
Also known as Dwarf Baby Tears or HC Cuba, this stem plant grows very small, tightly bunched bright green leaves along the surface of your aquarium substrate. Hemianthus callitrichoides is perfect for filling the foreground of your aquarium with a dense carpet of green.
This plant is moderately difficult to grow, requiring very bright lighting, regular fertilisation, a fine grained substrate and high levels of CO2 injection to thrive.
Height:3 - 5+
Hemianthus callitrichoides, sometimes known as dwarf baby tears, or more commonly as HC, was discovered by Tropica founder Holger Windeløv during an expedition to a small rocky steam east of Havana, Cuba; it was described in aquaristic literature for the first time in 2003. Since its introduction into the hobby, H. callitrichoides has become increasingly popular and a foreground plant of choice, making this once rare plant moderately easy to obtain.
H. callitrichoides is generally moderate to slow growing in the aquarium. It requires abundant lighting, generous nutrient levels, a fine-grained substrate and good CO2 levels to do well in the aquarium and will respond with a great deal of pearling if those things are provided. Two watts or more per gallon of compact fluorescent lighting or an equivalent light source will keep it growing close to the substrate. A good rule of thumb for this plant is this: The more light and CO2 available, the more the plant will thrive. Flourish Excel is accepted well by this plant and its use will result in noticeable growth improvements. H. callitrichoides can be grown emersed but is somewhat prone to fungal attack if the soil is not thoroughly saturated with water. A rich substrate like Aquasoil and intense lighting are recommended. The plant will flower with tiny white blooms if grown emersed, but the flowers are extremely small and easy to overlook.
In an aquascape, H. callitrichoides is sometimes planted between rocks or over wood to give an aged look. More frequently, it is used as a general foreground cover, often in combination with other foreground plants such as Eleocharis species. Its small size makes it especially useful for nano aquariums. When planting H. callitrichoides, there are two main techniques. The first is to plant small half inch plugs in the substrate at roughly one inch intervals. The second is to carefully plant individual stems close together with a good pair of tweezers (rooting fish will cause stems to be dislodged). There is some debate about which method is best for the fastest coverage, but both work well given good growing conditions.