Maybe too much water. Only water it every day if it needs it. It will drink more as it grows but make sure your soil dries out a little so the roots can breath. They sell cheap moisture meters for soil at any hardware/gardening shop. Maybe 5/10 bucks.
You can stick the probe in a few inches and it will tell you how wet or it is.
Thank you for your input guys. How much watering do you guys suggest, also we'v started putting in lemon juice to try and combat the ph level but it has done little so far.