not all the time- honestly I dont know how often it really does it. tank is 300+ display 100+ sump, 4 250w DE's, 8 x 64w actinic, tank mates are varied- sargassum trigger, pair of percs(not hosting this nem) melanarus wrasse, royal gramma, 2 chalk basslets, long nose butterfly, tuka anthias, lyretail anthias, mandrin, I think thats most of em. sps, lps etc........
params are spot on-
tank has been up 14 months now.
the haddoni has been in captivity for 3+ years I have had him for 3 months.
L.R.