your gonna laugh lol i really dont know what my PH is, ive never tested it before i do need to buy a kit tho. only one or two plants are suffering from deformaties but there are a lot of leaves throughout the tent that seem to curl under around the edges. i have been giving them quite a bit of nitrogen durring the grow and havent flushed all plants yet (only flushed a couple).
i will get a PH test kit this week, maybe i'll look on ebay and save some money maybe i should start flushing all the plants today and get it over with but im not sure how long after i should start feeding them again?
i used to keep a marine tank with living rock and stuff and i kept most of my test equipment but funny how thats the only i run out of, only got amonia and nitrate test kits left i asume any PH kit will do wether its for water or soil?
i see the dam spider mites are back so its neem oil time anyway so i may as well flush and spray at the same time thanks RT

EDIT: i keep the 600w HPS very close (maybe a little too close) something like 5 - 8 inches from the tops but not all are the same height but there are no leaf burn as the light is air cooled.