Curled pondweed
Potamogeton crispus
Potamogetonaceae
Potamogeton crispus
Potamogetonaceae
Lives wild in Afghanistan, Albania, Algeria, Australia, Austria, Baltic States, Bangladesh, Belgium, and 59 more countries.
Introduced to Argentina, Canada, Colombia, Costa Rica, Cuba, Fiji, Mexico, New Zealand, and 1 more country.
Potamogeton crispus, the crisp-leaved pondweed, curly pondweed, curly-leaf pondweed or curled pondweed, is a species of aquatic plant (hydrophyte) native to Eurasia but an introduced species and often a noxious weed in North America.
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.
The home of rainbowfish: water, substrate, plants and light for rainbowfish, blue-eyes and peacock gudgeons, with a long aquarium and open water in the middle.
A coldwater aquarium with European fish and plants, without a heater. The water follows the seasons, and summer heat is the biggest problem.