hello. i have my baby plant in a 5 gal bucket w/ an airstone. my seedling has the first 2 true leaves and the cotyledons are out, but not growing... last night I pulled out the rockwool cube its in and put the tap root directly in water in the area where the airstone is making all the bubbles, but i read it might not be getting any oxygen that way. So now I have the rockwool cube sitting on some gravel in a cup with some holes, it is about and inch or two above the water. any ideas?