hey guys my girlfriend has lent me this PH tester and it says my soil is mildly alkaline. :| not much use really is it.. I will try mixing in some vinegar with my next water feed. Any ideas anyone?

I flushed them out with lots of water and they have grown lots, and it looks like the yellowing has settled down a bit, It's possibly they were a lot more alkaline before as I stopped using nutes a few days ago,

Peace,
Denial

PS: more pictures soon.