I made a "flip flop" to spread irrigation water from a drip feed across more area in a planter. I think this type of thing could work underwater too. ...
Lungfish hydroponics aims to produce a modular ponics system where each module can be independent and easily switchable. It uses an external air pump to simplify the whole system. Blocked filters will be a thing of the past because there will be no filters! It is called "lungfish" because the underwater ebb and flow air container can act as a "Lung" to transfer oxygen to the nutrient solution.
A key to widespread use of DIY hydroponics is reusing various easily available products in the system. Another key is to keep the technology as simple and as "low" as possible. A 3rd key is modularity. Parts of the system can be modular so that they can be removed or adapted or replaced by a superior module as the system matures.
Step 2: Geyser control module, the only technically difficult part in the whole project!
This is the part I need to simplify. Or replace! Because it is a modular system, a replacement that works quite differently could also perform this switching operation. In th current system it is made from an energy drink bottle and a rubber bung with 2 holes drilled in it. The tube goes into the bung to let the air out as it cycles.
Step 3: Perlite grow media
The perlite is put on a sink cup stand inside remay or frost cloth and the water ebbs and flows up and down through the perlite. I measure the ebb and flow distance with a simple manometer. The system does and ebb and flow cycle in just over 2 minutes on about 2 litres per minute of air from the little aquarium air pump.
Step 4: Air pump
I used a 2 outlet aquarium bubble pump. This one is capable of 3 psi (enough to push air about 7 ft deep in water and about 2 litres per minute of air.
Step 5: Preliminary conclusion
We only need an ebb and flow every half hour or so and that means this little air pump is ample for at least 5 or 6 of these "systems". Prognosis Hopeful!
Bio:I am a stone mason. My hobby is making new solar cooking and gardening stuff. I have used solar heat to cook soil for a couple of years. In mother earth news in January, i read that their compost expe...read more »