Kevin and Paul's paper on the relationship between P and algae has found a home on the web at http://www.cam.org/~tomlins/ Eventually I will add some photos of Kevin and Pauls tanks so it can be seen just how well their ideas work in their tanks. Ed Tomlinson (tomlins at cam_org) Montreal, Canada Home of pppdial: http://www.cam.org/~tomlins/pppdial.html