Just out of interest, I have six small (~1.5 inches) Badis badis which are also reasonably effective at eating ramshorns, and to a lesser extent Malaysian trumpet snails, as long as they're not too big. William. _________________________ Dr. William King Test Engineer, dept of VV&T, Micromuse. Mobile: 07754 700925 Tel: 020 8875 9500 x 543 Fax: 020 8877 6201