
Commen water-starwort
Callitriche stagnalis
Plantaginaceae

Callitriche stagnalis
Plantaginaceae
Lives wild in Albania, Algeria, Austria, Baltic States, Belgium, Bulgaria, Czechoslovakia, Denmark, and 26 more countries.
Introduced to Australia, Canada, Chile, Falkland Islands, New Caledonia, New Zealand, Newfoundland, and United States.
Callitriche stagnalis is a perennial aquatic vascular plant species. Also known as pond water-starwort, C. stagnalis, may thrive in a variety of aquatic and subaquatic habitats, specially those exhibiting slowly moving to non-moving water. Although C. stagnalis does not pose a threat to humans, its reproductive rate may pose a threat to native vegetation in areas where it has been introduced, as the resulting dense vegetative mats frequently out-compete native species.
Two completely different aquariums: forest rivers with soft, brown water, roots and leaves, and Rift Valley lake cichlids in hard, alkaline water with big rock piles.
Two aquariums from Southeast Asia: calm forest streams and peat swamps with soft, brown water, and fast mountain streams with cool, oxygen-rich water.
A coldwater aquarium with European fish and plants, without a heater. The water follows the seasons, and summer heat is the biggest problem.
Light, nutrients and CO₂ in balance, low tech versus high tech, and how to read from the leaves what your plants are missing.