OK, i give up. I have read all the flourite strings but it is too late. I read the instructions and did not rinse. Now I have 15 small Cichlids and a substrate which is "burping" microbubbles all over. So now I need to remove it without killing the fish. It is a 29g and all of the fish are 1" long. I realize this is a tough job but it is the best idea I can think of. Any advice before I wipe out my fish by doing something stupid? Thanks.