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.
Step 1: Using easily available materials.
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.