So Im doing a fish in cycle and its not cycled yet. I just got a new fish today and got some life guard all in one treatment and i was wondering if i used that to prevent anything from spreading just incase to my new fish even tho the new one seems healthy but would the 2 week old carbon make the meds not work and i can't just take carbon out since my filter is a marineland penguin 150 and the cartridges are sealed. Should i not even worry about something spreading and would taking the cartridge screw up my cycling?! i can't quarantine it cuz my quarantine tank has fry in it and my breeding tank has a betta that Im trying to breed in it. I hope someone can help me out with this question.