Up until now, I havent added any livestock to the refugium. I have a big ol' bunch of Chaeto, and some grape caulepria (sp ?) but no live stock. I have seen all of the sudden a lot of cyano/slime blue green and red algae appear at the bottom on the sand. The base is rock rubble w/ a 5" sand bed on top of that. What critters should I add to the sump/refugium to control this, or will any control it at all. I also leave a PC on 24/7 over the top on reccomendation not to turn off for fear of putting the chaeto into reproduction. Hints/TIPS ? what nice little "pearls" of info do you folks have for me