This site is slightly confusing. It looks like you want to comment on another thread. Click on this link http://community.theaquaponicsource.com/group/arizona-aquaponics/fo...
At the bottom there will be a button that says "Reply to This". Click that button and type your reply. Underneath that there is a button that says "Add Reply", click it to post your comment.
Hope to see you on the tour!