The only thing I see missing is a parts per million pen, it's best to know how much nutrient your giving your plants. The plants will burn up if you give them too much.The PH should be around 5.8 to 6.5, 6.3 being optimum.A white interior is also as good as maylar, but its good to have some sort of vapour barriere so if maylar is hard to get try to get a white on one side plastic. Also don't feed when lights are off. and liquid Oxygen works very well,be careful with it as it is a food grade hydrogen peroxide,3 to 5 drops per 4 ltrs.Good Luck, and may the weed be with you.