Well I did a water change last night and then I tested the water then I did another water change today (as well as rehome a couple fish) and my levels improved but they're still off. I did about a little more than a 25% water change each time. Here's my readings from last night.... pH: 7.6 Ammonia: 0.5 ppm Nitrite: 0 ppm Nitrate: 40 ppm Then here's my readings from just now.... pH: 7.6 Ammonia: 0.25 ppm Nitrite: 0 ppm Nitrate: 20 ppm What could have caused the spike in ammonia and nitrates? I had a pretty consistant time and I havn't added fish for over a month. But I took out 3 pretty big severms today and ended up coming home with three rainbows (they gave me a deal I couldn't pass up) What can I do to make the test better?