Sealed room grow tent

http://img137.imageshack.us/img137/4789/tentg.jpg

I got some clones from a friend around the end of May, Vegged them under a few fluorescents and a 250 hps bulb for a few weeks, and now I am just past 4 weeks into flowering.

I am growing in a 5.5', 5.5', by 7.5' tall grow tent.

The babies are planted in a 4' x 4' box, 8" tall lined in plastic filled with grow mix. There are 5 rows of 5.

Air is kept cool by a home window air conditioner, I have a co2 booster pumpin some co2 hooked up to my circulating fan. There is a 4" inline fan cleaning up the air through a carbon scrubber.

Light is a 1000w hortilux hps in a cool tube.

I am feeding them Advanced Nutrients Grow, micro, bloom. Big bud and bud candy 2ml per liter as recommended on the bottle.

Temperature is about 77-82 with the light on and 72-74 with the light off, 60% humidity

I am currently 33 days in and my leaves are losing color, turning yellow and are now starting to get rusty.

http://img717.imageshack.us/img717/9580/rustyo.jpg