Chuck, How much and in what form do you put KNO3 into your 75 gallon tank? Aquatic Plants Digest wrote: > Do you dose Nitrate? I can give you some KNO3. Keep the nitrate level > up around 5ppm. -- John Pflum, Jr. PKG Consultants, Inc. 5533 Fair Lane Cincinnati, Ohio 45227 513/272-5533 Web: http://www.pkgconsult.com Email: jpflumjr at pkgconsult_com