I'm not bashing anyone. Apologies if I come across that way.
My fear is that if someone is trying to use this system as their first attempt for growing MJ, they are going to be very disappointed and give up the hobby altogether.
The Aerogarden is effective for growing herbs and I have had some success with this, particularly with basil. It can also grow dwarf cherry tomatoes at a push.
The main problem is that, unlike tomatoes and herbs, MJ is a photoperiod-dependant plant. Any disturbance of it's 12-hour dark period during flowering results in disaster. Either hermies or a complete stop or reversal in flowering.
This can only really be overcome by placing the system in a light-tight cabinet (£5, second-hand shop). The problem with this is that Co2 becomes a limitation, so the cabinet will need some active ventilation, i.e. a fan providing air-exchange. (£2 second hand shop or £6 new, maplins)
The second problem is that temperature is entirely dependent upon ambient temps. This can also be resolved by placing in a cabinet with the fan (would suggest a PC fan) being controlled by a simple adjustable 12V max dc transformer (£6 argos)
Next, you really want more control over the light times so attach a timer to the hood. (timer via kettle plug socket) (Who hasn't got one of thes lying around?)
Then you need improved lights over their weird light socket arrangements which force you to buy their over-priced bulbs. Just go and buy some cfls and fittings. This also then gives you the option of plugging in flower or veg Kelvin bulbs. (£1 per fitting, £1 per bulb, wilko)
Finally, upgrade the res unit with a bigger one capable of coping with these improvements, running your choice of hydro. Be it DWC, EBB/flow etc. (Any container lying around, £10 for a pump, either air or water from local pet shop)
Anything left over, use and yes, you have your highly modified aerogarden working perfectly!