I was doing a 50% water change and I accidentally forgot to dechlorinate the water. I was waching the filter parts in the undelchlorinated water :sob:. I'm afraid I accidentally killed all my beneficial bacteria. The tap water was in the tank for about 1-2 minutes before I realized I needed to dechlorinate it and the filter parts were in there for about 5 minutes. Will I have to start my cyle over again?