Review on Enhance Your Aquarium with KORDON #30011 Pond NovAqua Plus, 1-Gallon Concentrated Conditioner by Carron Goebel

I don't think this thing works at all. First, it smells like rotten eggs. changes weekly with it and I still get the same results testing the water with or without it. I test my water weekly throughout the year. I have 300 gallons. I chose this because it claims to do fewer water changes. For the past 2 months I've even tried doubling the dosage with every water change and let me tell you the nitrate levels don't change says it works for nitrates.