Hello, I am very interested in using ERW in my indoor garden. I have made my own using salt and home made electric nodes and am a believer in it's effectiveness as a pest control in agriculture. My question is, do you have a product that you would endorse for this? I would spend upwards of 500 on a machine but would like a cheaper option if one was available that would still work well. Can you suggest a brand because as you said their are a lot of knock offs out there. Thank you very much for your information on this sustainable, non polluting method of pest control.