After your post, I'm not sure I'm on the right site. You could have enquired as to my bona fides either directly in a post or pm me.
aerwyk, You are definitely on the right site and do not be upset because someone didn't agree with you. I've been doing Aquaponics for 46 years and I am continuously called on my thinking and experience.

As long as the posts are civil, a heated discussion is the best kind as it brings everyone into the fray.

Come on back and prove your point.