Hi. I have this little retarded sponge filter that does not stay down. It's triangle shaped. I don't know the "real way" of keeping it down. Right now i'm just using gravel to hold it down but it looks stupid having an 8 inch pile of gravel in the corner of my 10 gallon tank. Any help would be great. Thanks. O yea, while I'm at it.....I was wondering how people got those cartoon-like fishes to be under there name when they post. I'm new here. ~~~Joe