Hi Thanks for the comments

My set Up...

i have a cupboard which is 2.5 foot square and about 9 foot tall, i've had to readjust it all, with this grow coz they have grown so big

1 x 400watt HPS
1 x extractor fan think it said it moves 94sq meters an hour
3 x Oxypots (bought them on e-bay) or you could make your own, which is what i'll do if i want any more, it's just a bucket with a lid which holds a 3.5inch nett pot, oh and a tube which comes out of the side which is ment to help with changing the water but it leaks so i have had to seal them.
2x air pumps
3x air stones, i've found you get what you pay for with these.

I change the nutes every 3-5 days and they seem to do the rest

my fist two attempts produced about 2oz (dried bud) from each plant which is just enough to see me through til the next harvest.

i only grow to support my own habits