Originally Posted by jsgreer1
ok well my tank just started its cycle yesterday. i already put fish in there because i was ill advised by my lfs. my tank needs a top of and its time for a water change. is it ok to do a water change during a cycle or should i just add a little water for the top off?
Add fresh water(RO or distilled) for top off. Dont do any water changes until cycle is complete. IMO if you can return the fish to the LFS and have them hold it do it. Fish might not make it through the cycle.