most of the time nsw
is fine to use in your tank, but remember the shoreline is like the skimmer of the ocean so look around and make sure its not too dirty or your bringing lots of nasty stuff into your tank. What is on your damsel? fw
dip will help with certain things but not everything. we need more info. do you have corals, what meds are you planning on using?
most people run a bare bottom qt with pvc
pipe for fish to play/hide. wash everything with vinegar and rinse well before you put in the tank though.