Planted Tank Guru
Join Date: Jul 2010
Location: Denver, CO & Phang-Nga, Thailand
Either way will work - an outright purchase then repeated resale OR a group purchase. The purchase/resale approach seems so much easier, though, and now I am impatient!
The MQ-200 looks good on the website, although I have no idea what I'm talking about. There is also a cheaper model but it looks like you might need to buy a sensor to make it work, which will wind up being around the same price.
"The fewer our wants, the nearer we resemble the gods." — Socrates