Interesting, however this- "Sensitive corals, like Acropora
, do not thrive in the high-bacteria-count/high-TOC-level tanks examined, although soft corals do well (see pictures). On the other hand, SPS
corals do well in the low-bacteria-count/low-TOC-level tanks (Fig. 6)."
taken from that article (Thanks Dave) says we don't want too much bacteria anyway.