Cryptocoryne Parva

Cryptocoryne parva is the smallest species in the crypt genus. Its narrow, round-tipped, smooth-edged, medium green leaves usually stay 5–8 cm tall in the aquarium. A single clump slowly expands through underground runners and over time turns into a dense foreground lawn; however, this process takes months. It is a good choice for patient aquarists who want a permanent foreground that needs no trimming.

Unlike other crypts, it does not do well in shade: if it ends up under tall plants, its growth almost stops.

• Divide the clump from the pot into small pieces of 2–3 plants and plant them 2–3 cm apart; the gaps close in a few months.
• The roots must go fully into the sand, and the crown where the leaves emerge should stay at the substrate surface.
• Fine-grained sand or a nutrient-rich plant soil is suitable; burying a small piece of root tab next to the roots speeds up growth.
• Place it near the front glass, away from tall plants, so that it is not shaded.

• Light: Medium. In low light the leaves grow longer and the clump thins out.
• CO₂: Not essential, but noticeably speeds up growth.
• Fertilizer: A root tab every 2–3 months; liquid fertilizer is supportive.
• Trimming: Not needed; just remove yellowing and algae-covered leaves at the base.
• Neighbors: Floating plants covering the surface and fast-growing stem plants block its light; keep these sparse.

It multiplies by thin runners spreading underground. A plantlet that appears a few centimeters from the mother plant can be separated with its roots and planted elsewhere once it has opened 3–4 leaves. If you want to create a carpet, leaving the plantlets in place gives faster results.

• Melting: newly planted plants may lose a few leaves; if the roots are healthy, it sprouts again; do not pull up the plant.
• Algae buildup: because it grows very slowly, spot or brush algae can collect on the leaves. Keep the photoperiod at 7–8 hours a day; Amano shrimp and nerite snails help.
• Growth stopping: usually caused by insufficient light or nutrient-poor sand.