What am I missing

I am building a pc grow box, for learning and to get a nice little bit of green for myself.

I already have a large case with 2 fans, but I am not sure how to power it. Do I just use a normal PC power supply to power the fans?

Ph tester and PH up and Down:

http://cgi.ebay.co.uk/New-3-1-GARDEN-PLANT-SOIL-TESTER-MOISTURE-LIGHT-PH-/220701315682?pt=UK_Home_Garden_Garden_Plants_Fertiliser_CV&hash=item3362d2d262#ht_2598wt_1140

http://cgi.ebay.co.uk/pH-UP-and-pH-DOWN-GROWTH-TECHNOLOGY-2x250ML-/130464781226?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item1e604e93aa#ht_1694wt_1140

Also i am going to purchase these... 6400K for vegetation and 2700k for flowering. I am assuming I only need 1 of each as they are 125W and I am only growing one plant at a time.

http://cgi.ebay.co.uk/125w-Blue-Spectrum-CFL-hanger-hydroponics-grow-light-/290513162918?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item43a3ef12a6#ht_846wt_1140
http://cgi.ebay.co.uk/125w-Red-Spectrum-CFL-hanger-hydroponics-grow-light-/280606093511?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item41556d30c7#ht_846wt_1140


Mylar:

http://cgi.ebay.co.uk/Hydroponics-Mylar-Silver-Reflective-Sheet-80sq-ft-Insul-/220700078410?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item3362bff14a#ht_1056wt_1140

What else do I need? What soil/nutrients do you recommended in my position. I think am getting a carbon filter.

I think I am getting these seed by the way:

http://www.nirvanashop.com/us/feminized-marijuana-seeds/northern-light-feminized.html

Thanks any advice would be GREATLY appreciated.

Hi, people keep saying 'don't use miracle grow'. Why exactly is this? What does it have too much/too little of?

What am I looking for when choosing soil?

Also, what nutes would you guys recommend.