The Grow Cube / Grow Box is my entry for the 2016 Hackaday Prize. It is essentially a counter top / table top indoor hydroponic LED garden that you can use to plant edible vegetables.
In this Part 5 episode, I finalize the water supply issue. Previously, I had tried using a 1400 litre / hour pump that was much too powerful. Instead, I got this Aquael Turbo Filter 500 aquarium pump / filter which is just powerful enough to get nutrients delivered properly. I installed the pump and tested to see how the water supply works.
I also mixed my growing medium. I used 50% by weight Perlite and 50% peat (both red and regular peat). Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. It is an industrial mineral and a commercial product useful for its light weight after processing.
I also planted the seeds of the vegetables . micro-greens I want to grow. I chose spinach, arugula (rocket), some lettuces, garden cress, chives, marjoram and basil for this grow.