I thought so too .... and some others had also comment on that in the attached posts on that thread.
But I've also read in some goldfish books that Anachis is good with golds. I think it grows so fast that golds have a hard time eating it all .... but that would depends on the size & number of fish you have & how hungry they are!
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.