Not sure if that line is from water or a bug, but IMO I would try and get some perlite or vermiculite and use a bit of Nitrogen Plants use lots of Nitrogen during the veg state. Do not over water her. Make sure the pot gets light before watering it I found that there's nothing worse than over watering.
Give her some time and try and make it so you have more drainage Lime is a good buffer too if you over fert her.
If you scan through some posts here it may help you out quite a bit.
Welcome to RIU and hopefully you find all you need here.
Bear420