don't over water. from the pic it looks like the whole pot is moist soil, you only need to water probably 1/2 cup of water every few days, if that. I usually water seedings with 1/4 cup of fresh water every 4 days. can't stress enough don't over water. wait for the leaves to get a little droopy before watering.
tip for next seed you crack, start it in a dixie cup and let it root in there, makes watering easier and more manageable, not to mention reduces chances of pests from prolonged soil moisture.