you need air stones,big ones.Then you need to make yourself a lid for the aquarium to huse your plants in.i.e.,1/4" wood with 3 4" holes,say.fill the aquarium with water,turn on the airstones to get oxygen in there in abundance.2 8" discs are perfect.place the lid over the wter to wheethe bottom 1" of the net pot is in the water,add hydroton,STG and plants.Within a week you will see root development.Cool.After they establish themselves and are good and thick let the water recede to about 1-2" below the rootsand watch em grow.This setup is excellent for vertical grows.