Hey, all I know is that my little baby sailfin tang was an algae eating machine; once he discovered the outflow of my power filter--which looked like a dense jungle of hair algae (seriously, I had given up hope on ever seeing the plastic parts again!)--he picked that thing so clean I thought I had accidentally poured herbicide in the tank!
Though, I do accept the notion that most tangs are more "advanced" plant eaters; Im assuming their more natural diet is stuff like kelp and sea grass, or in other words, mostly just macros and other plants...
I can definitely see that, since Id think that macro algaes are more nutritious... right? Just a shot in the dark there...
Podman; Oh my sweet Pagan Pantheon! That is EXACTLY what Im going through right now! How did you ever win with just a skimmer though?! Im fairly sure my CA level is about 420-430, and I have (yeah yeah, I know you said good skimmer...) a Seaclone 100 that Ive just barely managed to calibrate right so that its not acting hyper-active style or just spewing micro-bubbles into the tank... I think my main nutrient export system right now, though, comes from two 100ml. pouches of Purigen in the "sump" of my Emperor 280, along with a pouch (pretty big, actually) of BioChemPure... I think Im gonna tackle phosphates next, then try a MUCH shorter photo-period. My photo period is from 10AM to 12AM (midnight); 14 freakin' hours!!!!!! 8O AAAAHHH! I know, I know, I should really make it shorter, but the truth of the matter is thats the only times I can get around to switching everything on and off... *slaps forehead*...