hey guys, I’m going to try to tell this story as easy and understandable as possible.... I HAD 3 Oscars in my grow out tank 75 gallon. My one original Oscar Ive had for a long time 4 months or so? I added in two other baby Oscars in to grow with him to all go to the 125 gallon. Here’s were issues started, yes I know I should have quarantine the two fish, but I never new about this being new. The one smallest Oscar seemed to be acting weird right off the bat, breathing fast, hiding 24/7, not eating and eventually died. The second one just recently died yesterday night, and the last couple days before today, he as pooping very long white stringy poop, and not eating and like i said, he died. Now I have my larger Oscar left in my 75, he doesn’t seem to be as lathargic, still doesn’t eat as I can tell, but h is swimming around at least. I ran to a local owned pet guy who has been doing this for years and he is guessing it’s a parasite internal. So he gave me this medicine (pic is what it is) what should I do? Will this medicine help???? Do you think he will make it? I woke up this morning and my Oscar was out but he has somewhat white poop but it’s still normal colored at the same time. Once again i know now that I should quarantine and I will never do this again, but I need help and advice. Thankyou.