I am picking up a used 125 tonight. What should I do in preperation before putting my fish in. This is currently set up and established and i have never done this. I know HOW to do it just not what precautions to take. If the gravel is in it should i just leave it and mix it with sand? may look nice. Should I trust that he didnt have parasites or anything? This was a community fish tank with live plants. OR should I just drain it all the way and scrub it and all that jazz that you would do with an empty tank?

