Freshwater
Hygrophila angustifolia
Acanthaceae
Acanthaceae
Lives wild in Australia, Lesser Sunda Is., and New Guinea.
Introduced to New Zealand.
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.
Light, nutrients and CO₂ in balance, low tech versus high tech, and how to read from the leaves what your plants are missing.