Of course it does, you contradict yourself.
- Here's how it works. Your biofilter converts the candy NH3 to NO3-. So there is no or little. NH3. Algae resorts to NO3-, but WH uses this also. WH means less NO3- for the algae. And I've seen it work. When I was new to this, I hired a maintenance guy. He took away all the WH saying that they were all gonna die anyway. The next thing I knew, the pond was completely filled with algae in the next day or two. And I mean filled so much that I couldn't see a few inches into the water. Co-incidence? I think not. Also, you ever heard of veggie scrubbers? So not a myth of a wacky idea. Makes complete sense.
Yeah, now, you're talking about the "co-incidence" problem, that is the solution was provided by the "stuff" on the plant rather than any contributions from the plant itself, and, when plants are involved, notice how the subject is twisted into suggesting that Water Hyacinth removes
all nutrients including the algae, which is quite silly. It is irritating when folk use "co-incidence" involved in denouncing other's reasoning.
The fact is Water Hyacinth adds to the resource competition, thus creating a nutrient imbalance, and also all aquatic plants release their own allelopathic chemicals in addition to encouraging more microorganisms to grow from the plant's roots.
Allelopathic Effects of Water Hyacinth (collaborated with Cairo University in Egypt and Illinois University at Carbondale) - Explains and demonstrates antimicrobial and anti-algal properties of Water Hyacinth.
Striking a Deal with the Weed From Hell : Using Hyacinth to combat algae (collaborated with University of Washington) - Explains and demonstrates how Water Hyacinth combats algae using shade, nutrient reduction, and amongst other variables.
However, there are algae that can come in defense of the algae being attacked by the Water Hyacinth.
Particular blue-green bacterium algae species can be introduced to the water from the wind or other critters, and, once these species are established, they can emit allelopathic toxins that can make Water Hyacinth chlorotic, which can eventually kill the plant and even other heavy nitrogen consumers and shading aquatic plants such as duckweed.
(location 1556, Walstad, Diana Louise (2013-05-15). Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise (Kindle Location 3428). Echinodorus Pub. Kindle Edition.)
Also, Water Hyacinth has a preference in absorbing ammonium nitrogen rather than nitrate nitrogen. (location 3419, Walstad, Diana Louise (2013-05-15). Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise (Kindle Location 3428). Echinodorus Pub. Kindle Edition.)
For waste water treatment operations, rather than using algae although algae is still beneficial in this context, a common plant combination in these operations to clean the water are Water Hycainth, duckweed, pennywort, water lettuce, pickerelweed, and cattails. (location 4389, Walstad, Diana Louise (2013-05-15). Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise (Kindle Location 3428). Echinodorus Pub. Kindle Edition.)
However, Water Hyacinth can significantly choke water of oxygen as shown in "experimental ponds with a water hyacinth cover but no submerged plants were shown to have only 0.2 to 3.0 mg/ l DO (dissolved oxygen)" (location 4730, Walstad, Diana Louise (2013-05-15). Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise (Kindle Locations 4736-4737). Echinodorus Pub. Kindle Edition.
So, it would be best to pair Hornwort, anachris, and other submerged plants below the above mentioned floating plants.
Also, Azolla can be mixed with the above plants since the Azolla's symbiotic relationship with blue-green algae can help prevent the algae from harming Water Hyacinth, that is depending on the blue-green algae the Azolla attracts. So, be careful when experimenting with Azolla.
However, it is unavoidable that some predation is required as well, either from fish or other algae eaters to control the blue-green algae, such as the
Chinese Hi Fin Shark, that is myxocyprinus asiaticus (which mixes extremely well in a goldfish/koi pond).
The reason it's wacky is because it is so easy to disprove. All it takes is measuring the ammonia and nitrate level. That's its. So simple a 5 year old could do it. And it's been done many times.
I've repeated this now for the 3rd time and obviously you have no interest in reading any of the material I've provide. But I'll repeat it one more time slowly....the water is toxic to the algae. The algae dies almost on contact. It doesn't starve.
Now I'm bored.
What material have you presented that indicates that there is
not a resource competition between aquatic plants and algae ?? None that I have noticed.
Nothing in that post you addressed infers that the Water Hycanth removed
all algae nor
all nutrients. He is just describing, while portaying an example, of what you called "resource competition" and how the nutrient imbalance impacts algae growth.
When in the aquatic context, resource competition against algae from plants can not simply be ignored by quite simply stating that "
the water is toxic to algae".