Here is an idea I have been using for a while. A friend of mine thought it was interesting and useful and wanted me to post . Basically I tie wrap two panels of egg crate lighting panel cut to size of refugium space desired. 1 box width sides. Cut the side pieces leaving pins on both sides to interlock the two panels. Tie wrap one panel to sides, bottom, and top. Place Chaeto inside panels and close shut with small tie wraps. Place in refugium 1-2" from waters surface. You could hold it in place with suction cups.Flip the whole panel periodically to get growth on both sides. When it is grown full and thick, pull it out and let it drain over refugium, creatures will fall out too. Trim both sides along panel squares with a sharp scraper type blade. Put it in a bag and take it to your LFS and tell him you want store credit for your Chaeto!