Annette: Thanks. THe little box is filled with rubble so that I can put shroom, xenia frags in them with low flow until the adhere to the rubble then I put them up on a frag rack to mature. I have some in there now and it has worked out well. The box is acutally from a fish breeding program and their is another solid, larger box that is the outside one. The one in the tank has slots in the bottom for water flow.





