Man just a tip, i know ive done this before but...
Go to the picture file on your computer and use the windows picture viewer to rotate the picture before you upload it. Save some ppls necks ya?
And doesnt it suck when that happens lol.
Whats the isomax 900 ? Like what size fan? Im gonna assume 6' cuz thats what size your tubes are..
I'm not entirely sure at all but i have a feeling you are going to need more ... those 3 hps lights are gonna generate quite a bit of heat.