The whole setup would be like 30 tops with everything (maybe less). If you can pull and extra gram you almost made your money back.....but......Im strictly hydro so Im not familiar enough with soil to know how long it would stay moist. I tried to set up a gravity drip for my chameleon over a 7 day trip once, lets just say I dont have a chameleon anymore Pressure is hard to judge in that kind of situation for that long. Peace