We did our first water change ever on Monday. We did a 20 percent change 10 gallons to be total. I did my first water test and the nitrate was and still is unsafe, the nitrite was at 3.0, hardness 150, chlorine 0, Alkalinity 120, ph is 7.2. That is why we did the water change and the lady at petsmart told me to buy and use Kordon Amquel plus Ammonia Detoxifier which at first I only added to the 10 gallons of water. The next day I checked the water again and it was worse the second day than when I did the test again. I am starting to worry. I hope the girl didn't lead me wrong on my tank. I have a lot of money time and most importantly love! My fish are my babies and I worry over them quit a bit. I know I am about to loose another Gourami I already lost one today and we haven't had them that long. Did the lady at the lfs lead me wrong?