Thanks for responding to my question re: cyanobacteria. I found some good info in the links and in the Krib -- which brings me to my question: Several people mentioned not disturbing the substrate when removing the algae; why? When I clean my tank, I use a vacuum attached to my Magnum, and pull gravel up to remove detritus, so it is shifted and moved around....is this a bad thing to do?
Doug
Doug