Homemade “Steel Can” Solar Air Heater! DIY – STEEL CAN Air Heater! (140F+) – EASY Instructions!

Published on 14 Oct 2013

Homemade “Steel Can” Solar Air Heater. made with STEEL CANS. produces consistent flow of hot (140F+) air. video provides full instructions on how to build it. this thing moves a LOT of hot air. air enters through vents at the bottom of collector and is heated as it’s pulled up through all seven columns of cans. the fan also draws heated air from the airspace surrounding the cans. all the cans are either soup or vegetable cans. one 9 foot piece of wood makes the frame. remember, they call it a (1×4) but it’s actually 3/4″ thick by 3 1/2″ wide. insulation is cardboard (store-bought insulation board can be used as well). the glass is a 20″ by 32″ inch piece of plexi-glass. fan is a ‘polar typhoon’ computer cooling fan. aluminum duct is 3″ diameter. use a 5 watt solar panel (or larger) to power the fan. slightly smaller panel will work but the fan may not run at full speed with a panel smaller than 5 watts. other details: use a 2.5″ hole saw to cut hole in back of collector. use 1/4″ drill bit to drill holes in the cans. put the cans in upside down (bottoms up), use standard flat black spray paint, and remember to seal it up for permanent oudoor installation.

Off-Grid Hydroponics Experiment – The Kratky Method & Floating Raft Hydroponics


Published on 5 Nov 2012

A major concern for people today is loss of electricity. If you are running a hydroponic system with air and water pumps, this can be a serious problem. Even with solar backup, it’s not easily dealt with. It would be nice to find a way to grow leafy vegetables in a hydroponic setup without any concern for the power going out, in a true off-grid manner. Plus, with no need for pumps, it would be a lot less expensive.

There is a way to do accomplish this goal. It is called the Kratky method, developed by a professor from the Univ. of Hawaii. He found a setup that would allow you to grow the plants in a static nutrient solution without the need for aeration.


I am testing Mr Kratky’s method and have learned a couple of things that that will help in the future. First off, it does work…and very well. It is so simple, just set it and forget it. But, for each setup, you need to be consistent in what you grow. Not all plants grow at the same rate, and if you’re not careful, the faster growing plants will consume the water and the slow growing plants will be left hanging. I saw this first hand.

The traditional floating raft with aeration has worked excellent as well. Swiss Chard, Arugula, Tatsoi Asian Greens…. they have all done great.

We’ll take a close look at some of the roots, and I think you’ll be impressed with just how clean everything is. And the Chard roots may surprise you with their colors.

In closing, if money is tight, or you’re short on time. … I don’t think you’ll find a simpler or more productive way to grow leafy vegetables than what I’m using in this video.

My nutrient formula: http://youtu.be/vYv9iu2NI3M

Aquaponics: Benefits, Case Studies & Implications for Urban Planning


Published on 11 Jan 2015

Aquaponics: Benefits, Case Studies & Implications for Urban Planning (Architecture and Design Scotland Pecha Kucha event 2014)

Aquaponics is being touted as the solution for food security. By 2050, 70% of the world’s population will live in urban areas. With this comes the problem of feeding the growing population, and it is compounded with the lack of arable land and the amount of water traditional farming uses.

The benefits of aquaponics are many: reducing the amount of fertilizer used in agriculture and potential polluting runoff, providing fresh produce as well as giving a chance for local communities to empower themselves. In this video, there are numerous case studies to provide example of how aquaponics has been implemented successfully on a commercial scale. The implications for urban planning is huge.

The video “PechaKucha 21 Pretty Vacant: Sinead Fortune – The Power of Fish Poo” by Architecture + Design Scotland can be found https://vimeo.com/107270667, usage terms under Creative Commons Attribution 3.0

Hydroponics: A Profitable Business || How to earn money growing lettuce?


Published on 23 Jan 2015

Hydroponics: A Profitable Business || How to earn money growing lettuce? Start a business venture in agriculture.

As shown in this video, agriculture could be profitable with the right knowledge and business planning. Would you consider starting your own hydroponics business? Comment below!

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Symbiosis food For Life Kratky Box’s


Each Kratky Box contains:
Bag of Gravel,
Plant Food
Net pots
Kratky Box’s Non circulating system Benefits:

Water conservation
Can be left whiles on holiday
No Digging
No Bending down as you can place them at a suitable height. (Ideal for wheel chair gardeners)
Stack-able for staring after growing season.
Can be placed in a conservatory or green house for prolonged growing.
No pesticides
No Weeds
No Moving Parts
No Pumps
No Electricity

For every two Kratky Box’s Sold, Symbiosis Food For Life will Donate one Box to a primary school in the Caribbean. We aim to donate 40 box’s per school.
Educating children from an early age. Growing there own and conserving water, is possible.

School Donations Up date will be posted on www.symbiosisfoodforlife.com

Errol on Tel.: 07403 428619