I accidentally left in the carbon filter for and hour or two after introducing the first dose of Tetracycline. My question is whether the removal of the medicine is more or less instantaneous or takes a good while. I know I lost at least some, but if it isn't much, I will just continue with the course of treatment. I would really rather not do a 100 % water change and start over unless I have to, but I will if I have to. I did see some yellow in the filter when I took it out and I shook it in the tank to try to put it back in. Any advice woule be great. Thanks!