Personally, I blame biopellets for all that is wrong in the world. Well, my reef world. I stopped using them, and my tank's had a tough time re-adjusting. I don't think they're a good idea for those of us who want a lower-maintenance system, since feeding has become an increased cost and effort. Perhaps I will use carbon and gfo, perhaps I will tear the whole thing down and get out of the hobby...
Paul