I was doing that with this particular tank, feeding it every couple of days checking the water but after 2 weeks I still had a ton of ammonia, nitrites, and nitrates. I'm probably just impatient but I really wanted to get this up and running. I do water tests every day so if I notice anything going terribly wrong I'm prepared to take them all back to the fish store. The minnow I pulled out last night is... Interesting. It stayed in one spot in the container I put him in for over an hour, then suddenly started swimming around like normal. So I held a flashlight up to him to see if I could notice anything that looked strange inside him, and the fish started doing it again. Floating in one spot and just twitching every few seconds. Put the light away and wait a few minutes, he's fine back to normal. He's a strange one.