Water evaporting during cycling; what should I do (if anything)

I’m on day 11 of cycling my tank. When I began the process, I added live nitrifying bacteria and fed it Ammonium Chloride to get the ball rolling. This method being a speedy way to cycle ones aquarium. Everything is going well. Ammonia is dropping, and nitrites are dropping, as well. The only issue that I have is that the water is evaporating. It has gone down an inch in my 30 gallon tank.

Is this problem?