Agent M Member Oct 21, 2011 3,536 1,586 Melbourne Nov 11, 2011 #1 Urchin Has anyone noticed that when you do a water change, urchins tend to spawn?
G gazman33 Member Sep 30, 2011 20 4 Cranbourne south Nov 30, 2011 #2 They tend to spawn when the salinity shifts usually when it drops rapidly