Solar Thermally Pumped Hydroponic System

Step 3 The reservoir

is made from the 2 liter bottle. Wrap the threads with tape and run a strip down one side, now spray the bottle with black paint to increase the amount of energy captured.

When dry remove the tape and fill half way with your nutrient mixture.

Comments

[kudoskun]

A half-full 2L bottle will get warm enough to push the nutrient solution into the 1L bottle? Are you expecting the rainfall to make up for the rest of the capacity of the 2L? What if you live in Az, where rainfall is rare. Perhaps then fill the 2L reservoir to capacity?

[Droose]

Just a suggestion, but if you make the viewing strip even half as wide you'll increase the potential "energy capture" area by quite a bit. In this sort of system you want to try and maximize the amount of energy entering the system.