May I offer this mini-tutorial for creating a 12 oz. beverage can container for soil growing? It could be adapted to a mini-hydro with minor modifications.
Start with the can of your choice. Acquire an older style of hand crank can opener. The newer style of side cutting can opener that I have in my kitchen does not seem to work, but ymmv.
It wont feel like its working at first until it mashes the soft metal of the top rim down into a path it can follow to cut. Just keep running around and around, cranking it forwards and backwards. Within a few rounds it will start breaking through in places all around the top. Just keep going until it breaks all the way through. You may need to wiggle the last little bit with your fingers or if you have a stubborn spot, use a razor blade to get the final bit. I dont have a picture of that because this one just cut all the way till it fell inside.
It will leave a surprisingly smooth cut, but WILL have sharp spots so be careful. If your particular type of can opener dented in around the top of the can like mine did, just lay it on a firm surface and use your fingers to carefully press it back out as best as you can.
Now find a sharp poking device such as an awl, nail, screw or such. Though I am using a screw here, I recommend a smooth tool. If you do use a screw, be careful to
twist the screw out instead of pulling or it will leave sharp points sticking out that HURT the fingers. Poke however many, as big or as small as you want, there doesnt seem to be a right or wrong.
There you go, just add soil and seed or clone. It's easy, peasy everybody, join in the fun!!
