Originally Posted by joonpeng_lee

if i were u..
1. i would have open my eyes BIG BIG when selecting the fishes..
2. i would never mix the new and the old batch together all at the first time.. i
3. i would have QT the new batch for 5-8 days before mixing into the first batch.. u never know your first or second batch have got more parasites
4. i would have removed the 3 bad finrotted altums and treat separately
5. if i would have to keep altums, i would have prepared an additional 1 or 2 more QT time

Well.. treat this lesson as a good learning curve either in selecting the fishes you want to keep and the QT regime that all must practice and goes through in fish keeping