I finally got my soil PH tester and most of the soil is 7 to 7.5 what is the best way to bring the PH level down? On a side note I did not harden my plants to the new MH bulb and burnt them, a couple leaves fell off or are curling in and they produced some very shinny leaves and the older leaves are struggling to look up. I'm raising the bulb alot but should they get a day of shade?
http://imgur.com/JQSB6.jpg
http://imgur.com/JQSB6.jpg