submersible virsion... http://community.theaquaponicsource.com/forum/topics/diy-heater-submersible-heater-build-your-own-2000-watt-element ...this how-to has the link for the stainless elements. After many variations, this is the simplest heater I've been able to build. I had to come up with this last year while waiting for my $600 heater to be built and delivered. when it finally arrived, I just…