sounds like u have 2 things that might be going wrong, first what type of light r u using? it needs to be a fluorescent or a cfl preferably 60 watts cool white for seedlings up until they r ready to transplant to their permanent spot these need to be kept no more than 2" from the tops of the plants at all times which means you will have to adjust them probably every other day this will keep the plant from developing stretch, you want to keep about an inch between nodes for properly grown plants. second water only when the soil is dry crusty on top and the container feels really light which depending on the size of the container and the drainage is every 2 to 3 days. hope this helps