Join Date: Sep 2006
Location: Forest Hills, NY
why would you add fish to a tank you just add/changed the gravel?
you need to wait for it to cycle first, and leech out it's impurities.
if you still have some of the original tank water handy,
I would consider removing the fish to a spare tank.
you don't want to go to sleep tonight with fish in a tank testing
high ammonia, or at least see if directly adding dechlor will help.
if you have carbon and or ammonia chip media, put some in your
canister filter temporarily.