A very exspensive closed enviroment with flouro's. If you can find one laying around maybe, your better off to get flouro's and soil or hydro. It would be cheaper and better. You can go look at them there name dot com. You have to use there stuff, they call it pyraponics. A friend and I have tried nine ways of sunday to use something else in it and failed. I just tried to make one into a bubbler and it stayed to hot it needs vent fans. You use spagnum moss and there nutrient and instruction to the tee or you will fail. I don't care how long you let it go it just doesn't have the horse power to flower. check them out but don't buy, ask more if you want to know.