First off, I wasn't entirely certain where to post this so if I'm in the wrong place feel free to let me know.. The other day I was browsing through craigslist and found a tall 30gal with a nice wooden stand for a very reasonable price. It included a filter (tetra whisper) a bunch of cartridges, an air pump, cover with light, siphons, undergravel filter and an assortment of chemicals including prime, food, etc! How could I pass this up? Anyway, it is in my apartment now, and I admit that I have no idea where to start.. How might I go about cleaning all of these items so they will be safe for my fish? I've heard of using vinegar but I just want to clarify this since I am frightened there will still be residue.. My real dilemma is that I do not have the space to run both tanks at once because I live in a very small apartment. In other words, I need to switch everything all at once. Is it possible to safely switch from one to the other without suffering through a full cycle and huge ammonia/nitrite spike? I plan on moving EVERYTHING from the 10gal to the 30; gravel, pump, decorations, plants (silk), filter (I'll be running two at once in hopes of avoiding a huge ammonia spike). Does this sound like a reasonable idea? I'm not sure what I'm in for.. Here are some specs on my 10gal in case you guys need this info: ammonia:0, nitrite:0. Temp: 80. 2 honey gouramis, 3 rummynose tetras, 1 panda cat. Lastly, does anyone have any fun ideas for stocking that will be compatible with the fish I already have?