I am so glad I found this forum. I have been searching the web and watching Youtubes for a couple of weeks and this site is the best source of info that I have found. I especially appreciate the "Aquaponics 101" lessons. Thanks Oliver for your great work. I am a 6th grade science teacher and am going to set up a 50 gallon tank system in my classroom. I hope to get folks in our community interested and perhaps develop a community growing center. Thanks again for the site.