free tank

hey guys my tank has run into some serious problems where there are microbubbles everywhere, sump baffles are coming apart, ich outbreaks, nudibranch outbreaks, and water level issues. i was wondering if anybody had a 45g-75g tank that they are taking down and would donate as i cant really...

My buddy just gave me his old AIO Evo. This thing was previously infested with everything in the book... I planned on setting this up as a QT. After a deep scrub... Is it still even worth using as a QT or am I playing with fire?