hey everyone im treating my quarantine tank that houses one clownfish who unfortunately has velvet. I have a sponge filter in it and Seachem matrix for some biomedia. I dosed with cupramine today, I added the recommended dosage which was 20 drops for 10.5 gallons. I have a salifert test kit bc I couldn’t get my hands on a hanna test kit today, and every time I test the water, it always comes out to 0. Could the matrix and or sponge filter be absorbing the copper?


