The online publication of the Minnesota Aquarium Society Aquazine Minnesota Aquarium Society since 1931 Rolf C. Hagen - Makers of aquariums and aquarium accessories www.hagen.com Boyd Enterprises - Makers of filtration media. http://www.boydenterprisesonline.com/pages/1/index.htm Marine Enterprises Inc. - Makers of marine salt, substrates and protein skimmers http://www.meisalt.com/Site/Default.shtml Kent Marine - Makers of freshwater and marine additives, filtration products and fish foods http://www.kentmarine.com/html/home.html Novalek - Makers of water conditioners, medications and aquarium accessories http://novalek.net/ Marc Weiss & Company - Makers of freshwater and marine additives http://www.marcweissco.com/ Penn Plax Plastics, Inc. - Makers of all types of aquarium related products http://www.pennplax.com/Pages/Aqua.pages..../Aqua01F.html San Fransisco Bay Brand - Makers of Brine shrimp fish food related products. http://www.sfbb.com/home.asp Zeigler Brothers, Inc. - Makers of aquatic nutrition. http://www.zeiglerfeed.com/ Aquarium Systems - Makers of many aquarium products and accessories. http://www.aquariumsystems.com/ Aquatic Eco-Systems - Makers of aquatic tools http://www.aquaticeco.com/