^ I don't think that is necessary. People have different way's of doing things, and different priorities.
To the OP, nobody wants to burn you, we all want to help. A few suggestions to you would be to leave the tank set up, and do partial water changes, gravel vacuming, and filter maintenance once every two weeks. I understand that you weren't in charge of the tank for a month, but the degree of dirtiness suggested in your post leads us to believe that these things weren't done, or whoever took care of your tank overfed ALOT. If you have any questions about mainteneance, please feel free to ask, we can help you get a schedule set up that won't be stressfull on your fish, will be faster, easier and cheaper than a full tank makeover. What's not to like?