Freshwater
Arrowhead
Sagittaria sagittifolia
Alismataceae
Sagittaria sagittifolia
Alismataceae
Lives wild in Austria, Baltic States, Belgium, Bulgaria, Czechoslovakia, Denmark, Finland, France, and 18 more countries.
Sagittaria sagittifolia (also called arrowhead because of the shape of its leaves) is an Old World flowering plant in the family Alismataceae.
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.