I'm exactly three weeks into cycling a 55 gal (long) tank with several small fish, and I'm curious if these numbers sound normal to you. Since day one, the ammonia levels were slightly high (between .25-.50). Perhaps that was due to the fact that I was using Prime, which apparently distorts your ammonia tests. But anyway, today my ammonia level was .25, while nitrite and nitrate levels were both 0. FWIW, I'm using a emperor 400 filter and I've been doing 20% water changes every 2-3 days. Does all of this seem normal to you? Has my tank cycled or does it need more time? Thanks.