Whats the overall consensus on cleaning the walls of a refugium??? While my tank is a little over 3 months old, I have some alga growing on the walls and over the divider into the center return section. I saw pix of Marc's refugium per the review of the Refugium LED Lighting system and it's crystal clear. on mine, I've noticed that in amoungst the algae thats growing on the sides, are pods and little creatures. Am I inviting trouble in scraping the sides down and clearing out the ...