John,
I share some of the same opinions about your ideas on filtration...I love the natural method of filtering, especially the bivalve filters...I have an obsession with growing macro algae for nutrient export...in fact, my 220 in wall runs "NO" protein skimmer...i love the growth of the naturals so much that i acutally had a custom tank made for my refuge/mangrove filter...it is 48x24x12 (seen in url below)...but i do have a question aboutthe grape calupera...mine grew out of control, until the mangroves started to really root out and take off..not the calupera is dying off...keep in mind that i added 120 mangroves at once...I think they died off because the mangroves are using all the nutrients...let me know what you think...
http://img.photobucket.com/albums/v4...13/euro011.jpg
BTW...ABSOLUTLY STUNNING TANK...GREAT JOB
ED