dkpate. I took all my fish/decor/media out, put them in a bucket, drained the tank, scooped the gravel out with a big kitchen spoon, (I had my sand rinsed already), put the new sand in, filled the tank with the appropriate temp of water, added dechlorinator, put the decor and media back in, (make sure sand/gravel is settled BEFORE you turn the ...Web