Is it common to get a large outbreak of BBA when first using Laterite in the substrate ? Presumably, this may be because of a large amount of Iron/Nutrients in the water column ? Andy Moore - andy at ascot_u-net.com Treasurer/BBb Tuba Player Poulton-le-Fylde Brass Band and Aquatic Plant/Discus collector http://www.ascot.u-net.com/home/Band.htm