So I am having a parasite problem. I tried asking about what they could be but no one ever replied to my post. I lost one dwarf goby. Three chromis so far. My watchmen goby seems to be struggling now and my two clown fish are having fins deteriorating and have white spots under there skin. I have some snails and crabs in there as well. I don't have a quarantine tank to treat them properly. So I'm just hoping this meds Im using helps otherwise I'm going to lose everything. But what I want to know is if I lose everything, do u need all new liverock and substrate in there? I don't know the life of parasites after fish are gone and if they will just still be alive if i remove all water and substrate or what the correct process would be