Yeah, I thought that was an awfully large element as well.
Apparently he could not find smaller elements
that were not made of copper.

It has been brought to my attention that I violated a rule
against posting links to other aquaponics fora.
I didn't mean to offend;
I just saw information pertinent to our discussion
and thought it would be useful to the members here.

Moderators, feel free to delete my post.
I don't understand the reason behind the prohibition,
but my rule-breaking was wholly inadvertent.
Sorry about that.

Shas