Hey! Check your tap water for ammonia. If your water processing facility uses chloramine instead of straight chlorine (chloramine IS ammonia and chlorine)- it will have ammonia. Mine comes out at a whopping 1ppm where I live- and I have a slight reading for about 12 to 24 hours immediately after a water change. If that's the case, still do your water changes- just do no more than 25%, and make it a bi-weekly change instead of once a week. A Python style water changer will be a GREAT help for this- it hooks up to a faucet, when you turn the faucet on, it starts the siphoning (you can turn the water off after it is going, it will keep right on working), and then you just turn a valve & fill the tank directly from the water source (just dump enough water conditioner into the tank to treat the whole tank, not just the amount you're adding back in), instead of lugging buckets. I LOVE IT!!! I do other housework while it is going, and just check on it every 5 minutes. (Mine has a "fish saver guard" attached at the bottom to keep anyone from being injured, but, you can just throw pantyhose over the bottom end, too.) My guess is you have ammonia in your water source... which is pretty common, actually. Also, you could very well be doing a mini cycle- it does happen when you move tanks, even if you keep everything wet. They usually don't last long, though... my 50 gallon mini-cycled after moving it, and I had .25 on both ammonia and nitrites for a week- then they were gone. Still check the tap, though.