i have heard that the more you water in mg soil then the more of the slow release ferts are allowed to get to the plants. get them out if you want to save them. they are still sooooo young and soooo fragile at this stage. if you are extremely careful you could repot into promix or something similar removing as much of the mg soil as possible without damaging the root system. i have never used mg myself so i am just telling you what others have told me about there experiences with it and not my own experiences. i always used a mix made up of 60%promix bx, 40%perlite and 1tbsp dolimitic lime per gal of soilmix with excellent results. good luck!!!