Pest identification
What's eating my eleocharis acicularis?
Algae (green dust, thread algae)
Signs: Green coating or fuzzy strands on grass blades, blocking light at substrate level
Control: Carpet plants need strong light and CO2 to outcompete algae; add Amano shrimp and otocinclus for grazing support
Snails (bladder snail, pond snail)
Signs: Uprooted runners and bitten blade tips disrupt carpet formation
Control: Remove by hand before planting; assassin snails work well in established tanks
Koi and goldfish (outdoor ponds)
Signs: Rooting and grazing destroys carpet patches, exposing bare substrate
Control: Protect with mesh or relocate to a pond stocked only with smaller, plant-safe fish
Keep eleocharis acicularis pest-free
Healthy plants resist pests best. Get the basics right:
Eleocharis acicularis pests — FAQ
What is eating my eleocharis acicularis?
Eleocharis acicularis (Dwarf Hairgrass) is a popular aquarium foreground carpet plant. Algae smothering the fine grass blades is the most common problem, especially during initial growth. Snails uproot delicate runners. In outdoor ponds, waterfowl and pond fish such as koi graze or disturb the carpet.
How do I get rid of algae (green dust, thread algae) on eleocharis acicularis?
Green coating or fuzzy strands on grass blades, blocking light at substrate level Carpet plants need strong light and CO2 to outcompete algae; add Amano shrimp and otocinclus for grazing support
How do I get rid of snails (bladder snail, pond snail) on eleocharis acicularis?
Uprooted runners and bitten blade tips disrupt carpet formation Remove by hand before planting; assassin snails work well in established tanks
How do I get rid of koi and goldfish (outdoor ponds) on eleocharis acicularis?
Rooting and grazing destroys carpet patches, exposing bare substrate Protect with mesh or relocate to a pond stocked only with smaller, plant-safe fish