I have a 10 gallon QT tank. i added 16 drops for 10.5 gallons (15 for my tank) the first day, and on the third day as the instructions say. I tested the water today (4th day) and the copper level is apparently at zero. Is this normal, or is there something wrong with my test kit? I'm trying to keep the level at .5ppm
Thanks, Nick
Thanks, Nick