Among the most magnificent members of the cryptocoryne genus. On long cuttings, oval leaves have an exquisite color: below they are purple-red, and above they are olive with larger, lighter spots. In ideal circumstances, the shrub grows to a height of 50 cm. A tall aquarium with lots of space is ideal for raising cryptocoryne.

Put it in an underwater garden’s background. It goes very nicely with long-stemmed, light-green plants with small leaves, like cabombas, hygrophiles, and limnophiles. Aquarists are rightfully fond of Cryptocoryne. It grows fairly slowly but steadily all year long, even in ideal conditions.
24 to 26 °C is the ideal temperature range for growing cryptocoryne. Growth stops when the temperature of the water drops to 22 °C.
Although it can grow well in soft water, Cryptocoryne blassa prefers medium-hard water. Hardness between 6 and 16 ° is ideal for this type of plant. Practically speaking, the water’s active reaction is meaningless. The ideal growing conditions for cryptocorin are neutral waters; slightly acidic and slightly alkaline waters are not good for it. It grows a little better in older water, so it doesn’t require frequent water changes. This kind of cryptocoryne is highly adaptable to pH fluctuations in water and hardly ever sheds its leaves.

The leaves take on a particularly lovely, deep color in direct sunlight. Cryptocoryne grows satisfactorily in moderate shade, but its beauty is diminished. Both artificial and natural lighting that is similar to natural in spectral composition are appropriate for it.
You can use any combination of these light sources, as well as LB-type fluorescent and incandescent lamps. Fluorescent lights can have very little power—0.3 W per liter of volume is more than sufficient. The daylight hours last for twelve to fourteen hours.
For Cryptocoryne blassa, the soil needs to be well-silted and sufficiently nutrient-rich. You can use coarse river sand or pebbles of any size; the type of substrate is not important. Incorporate charcoal, peat, and clay into the newly created soil. The plant takes a very long time to reach its full height after being transplanted into new, poor soil. Since this species develops strong roots, the soil layer needs to be sufficiently thick—at least 7 cm.
Particular mineral top dressing is not necessary if the aquarium contains a large number of fish, as the addition of minerals has no discernible impact on the growth of cryptocorins.
The plant can only reproduce vegetatively in artificial environments, creating subsidiaries on a long, creeping rhizome. Young plants are ready to be moved to a new location once they have formed three or four leaves.
Blassa cryptocorin grows noticeably better in a palyudarium or a humid greenhouse. In this instance, the sheet cuttings’ height drops, the leaves’ shape doesn’t change, but their coloring gets muted. Cryptocoryne blooms in the summer-autumn season in nutrient-rich soil that is at least 28 °C in temperature and has enough light, but it does not produce seeds, as was previously mentioned.
- Category of the entry: Aquarium plants from A to Z / Plants for the aquarium – K
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Because of its remarkable look and versatility, aquarium enthusiasts often choose Cryptocoryne blassii. This plant gives any tank a soothing, organic look with its wide, green leaves that have a hint of curl to them. It can flourish in a variety of water conditions, so aquarists of all skill levels can use it. For fish and other aquatic life, Cryptocoryne blassii makes a lush, peaceful addition to a planted aquarium because of its slow growth rate and low maintenance requirements.
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