Aquaponics Made Easy - Video clips.

[Murray]

A collection of video clips.
Below:-
This is a teaser to Murray Hallam's complete DVD to making your own Aquaponics system, from either a kit or recycled bathtubs. Murray will demystify the dark arts of growing fish and vegetables organically. http://www.aquaponics.net.au
As of today this first clip has had 72,600 views in 12 months
DVD production by Flashtoonz Films http://flashtoonz.com/blog/
.
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[Castaway]

Hey Murray, I just noticed that you clocked over 50,000 views of that top Aquaponics Made Easy video clip on YouTube. Thats amazing...

[Murray]

That's amazing Castaway...Last time I looked it was at around 45,000

Now 72,600 views ...Feb 2010

[Murray]

Additional material extending this clip is included in the new "Aquaponics Secrets" DVD which will be out very soon.

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[stucco]

The song in the ap for profit video is a curious one. How did you come by it?

[Castaway]

Its production music that we have in our library. Wanted something that had a "watery NFT pipe" feel...

[Tsaphah]

Hey Joker, was it recorded in your bathroom???:(

[Murray]

Vid #7 Conference Clips – Shade Sunlight, People Power, Filters.
A morning with Murray at the Aquaponics Association Conference in Orlando September 2011.
This 7 (approx) minute clip discusses
Shade and sunlight, people power, fish food, duckweed, NFT, filters.

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[RupertofOZ]

Just a point on one of the questions asked.... "duckweed can fix nitrogen from the air"....

I don't believe this is true...

[Murray]

That is true, it does not.
However, duckweed is often found in company with Anabaena azolla which does fix nitrogen from air.

[RupertofOZ]

I don't think that's true either Murray....

Nitrogen fixation is AFAIK done by bacteria living in the root systems...

[RupertofOZ]

OK... could be wrong.... seems Anabaena azolla.... Anabaena... a microscopic filamentous blue-green alga or cyanobacterium... which has a symbiotic relationship with the azolla... can actually grow within certain leaf structures...



sample of Azolla examined under a microscope will have filaments of Anabaena living within ovoid cavities inside the leaves. Like nitrogen-fixing bacteria living inside the root nodules of legumes, the relationship appears to be mutually beneficial


http://waynesword.palomar.edu/plnov98.htm

[Murray]

Without going too far in my search I found this in good old totally reliable information Wikipedia..Whistling....( I am aware that seeing it in Wiki does not necessarily make it true)..Whistling

Azolla filiculoides
From Wikipedia, the free encyclopedia
Azolla filiculoides

Azolla filiculoides (Water Fern) is a species of Azolla, native to warm temperate and tropical regions of the Americas as well as most of the old world including Asia and Australia.
It is a floating aquatic fern, with very fast growth, capable of spreading over lake surfaces to give complete coverage of the water in only a few months. Each individual plant is 1-2 cm across, green tinged pink, orange or red at the edges, branching freely, and breaking into smaller sections as it grows. It is not tolerant of cold temperatures, and in temperate regions it largely dies back in winter, surviving by means of submerged buds. Like other species of Azolla, it can fix nitrogen from the air.

[StevenBris]

Azolla can fix it's nitrogen from the air but generally prefers to source it from water. Fixing from a water source is less energy costly so is preferred. Duckweed is often used as a final water "polisher" before water release as it will remove the minor remaining nutrient traces. It's sometimes followed by an azolla pond as it can grow without the water sourced nitrogen but will switch back to water sourced nitrogen when it becomes available.

[RupertofOZ]

Poking around Murray... it seems that most species of Azolla can be nitrogen fixing...

But only within a symbiotic relationship with the "Anabaena" algae cynobacteria... like legumes... it's not the plant itself that does the fixation...

The surprising bit to me was that the bacteria were contained within the leaf structures... and the fixation (by ATP) was closely linked to photsynthesis...

P.S... the nitrogen fixation process apparantly actually releases ammonia into the water.....

[Murray]

Very interesting group of plants that is for sure.

[davidl]

While I was planning on running a little experiment to see how long I can run my little system only on duckweed I believe there will be a nutrient shortage at some stage, and the duckweed won't grow. Though the single goldfish eats too much too fast, and the duckweed growth can't keep up anyway. But with the anabaena & azolla does this mean we can devise a system where we don't have to feed the fish anything but the missing nutrients in duckweed, possibly obtained from the mosquito larvae that are deposited in the tank?

I'm picturing a scenario like the following nutrient flow
Anabaena + azolla collect atmospheric nitrogen =>
ammonia => duckweed => fish => ammonia =>
|
v
nitrites => nitrates => plants

It looks like you could skip the fish stage, but I'd want fish to eat the mosquito larvae in the tank, plus I like eating fish.

Also can fish eat azolla? Because I read something about the symbiotic bacteria that lives in the azolla has a neurotoxin...?

[Murray]

David, the fish don't like Azollla all that much. Don't know why. It is just what I have observed.
I deliberately mixed it in to grow with duckweed thinking I would have a good thing going. Took me ages to finally get rid of every little bit from the system.

[toraman]

David, the fish don't like Azolla all that much. Don't know why. It is just what I have observed.
I deliberately mixed it in to grow with duckweed thinking I would have a good thing going. Took me ages to finally get rid of every little bit from the system.Hey Murray. I've found my Silvers have been eating Azolla ok here in Canberra this Summer. I have both a Duckweed and Azolla growing area in the greenhouse... I did try growing them both together but the Azolla crowds out the Duckweed pretty fast. Also the Azolla offers better support for bees landing to take a drink.
ps...of course my chooks love both :)

[Walks-In-Storms]

That is true, it does not.
However, duckweed is often found in company with Anabaena azolla which does fix nitrogen from air.

You guys - Biggles, Francois, Rupert, and others here - are making me want to go "walkabout." Try as I may, I can only grow vegetables in pails - and fish (Koi) in my little backyard fishpond.

And I'm seriously thinking of planting weeds - like your duckweed (maybe some nice thistles....) and such - in my grow beds, that in order to perhaps make my catfish survive to something like adulthood. I may have to start all over (or leave this part of Texas....).

Good stuff, though, and thanks!

[StevenBris]

Back in the "recession we had to have" interest rates hit 27%. I was going to lose my house and everything I'd worked hard for. Rabbits trapped in the nearby cemetery and "weeds" kept me going. All my wages went on the mortgage and rates and utilities. It's amazing what food grows wild nearby when you actually need it. Off course you have to wash it well, but it sure is tasty. Dandelion, wild dock, wild anise, wild celery, amaranth, mushrooms, pigweed, all abound in most Australian cities. People with neglected fruit trees are often happy to have you trim the trees and take some of the fruit as payment for the work done. Bunya pines surround Rookwood cemetery.

You grow potatoes in columns to maximise growing space. Onions, garlic and shallots grow anywhere. Asian and Russian vegetables were sought after as many had extremely short growing periods, I became quite friendly with the local Slavs, Vietnamese and Chinese, many of whom had a broader accent than me! It's amazing how many cultures LOVE rabbit and will gladly trade FOOD for a freshly killed,skinned and cleaned rabbit.

Keating may have thought it the "recession we had to have", but the Labor Party is still paying for it.