[Ebook] Encyclopedia of Aquarium & Pond Fish – Directory of Pond Plants – Oxygenators
These plants, which grow beneath the water’s surface, play a crucial role in creating a healthy environment for pond fish, because they release oxygen into the water as a by-product of photosynthesis. They also help to maintain water clarity by competing for dissolved nutrients with particulate algae (which are responsible for the green hue of pond water). Some species also produce highly attractive flowers. Oxygenators can, however, become rampant, and it may be necessary to remove clumps to ensure that the fish have adequate swimming space.