Overview
The Freshwater Sponge (Spongilla lacustris) is a advanced freshwater species known for its green (photosynthetic algae), white coloration. Rarely survives long-term. On surfaces.
Origin & Appearance
Origin: Worldwide.
Colors: Green (photosynthetic algae), White.
Body Shape: Coral Colony (mound/boulder). Typical adult dimensions: 10.0 x 8.0 x 6.0.
Sexual Dimorphism: N/A.
Tank & Water Requirements
| Min Tank Size | 11 gallons |
| Temperature | 64–77°F |
| pH Range | 6.5–7.5 |
| Water Hardness (GH) | 5-15 |
| Bioload | very-high |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | On surfaces |
Behavior & Activity
Completely sessile; grows attached to surfaces; filters water through body; zero locomotion
Speed: 0/100Aggression: 1/10diurnalSchooling (6+)
Breeding
N/A; grows vegetatively
Common Diseases
💊 Dies in poor water💊 toxic if decays
Expert Notes
Rarely survives long-term; needs pristine water