Phil,
I would love to learn more about this. Are you growing them for aquarium use? Regardless, I find this to be very interesting and was wondering how you go about it. there do not seem to be a lot of articles out there, at least that I could find. I have heard a reference to your soda bottles reciently and now I get it
Feel like doing a article about your technique
? Or is that already one. Substrate, light, heat, water, ferts? Oh tell me more, tell me more.