Quarantine tank - next steps
 

All,

I have been cycling my quarantine tank for a week now. I threw in a piece of fish filet (skinned off of course) and took it out last night. While doing so, i noticed a lot of the filet have started to fall off causing it to float around in the tank.

While cycling, should I remove the pieces by doing a water change? or leave it in there as its good for beneficial bacteria?

Just leave it. It wont hurt anything. Just test the water for ammonia

so when do i do a water change? I see pieces of the filet flying around

When the QT is done cycling

You can do small water changes, I'd say 10% every other week while it's cycling.
Just don't do more than that, if you do then the cycling process will take a bit longer for the bacteria to populate.

You can still test the tank but just leave it until nitrite and ammonia are at zero then do a 20% water change just top it off with freshwater while cycling.