Hey Weedhound thnx for ur time!

Well i waterd plant today with nutrient solution at ph 5.8 then checked the run off which was ph 6.9!!
I dont have anything to test the ppm.
I used rockwool thinking it was ph stable looks like i was wrong! any quick way of helping this poor plant? The leaves from the pics above are pretty much dead now.
budlover85 Reviewed by budlover85 on . Newbie needing help please 4week old plant!! Hi this is the first grow ive ever attempted!! I bought 5 feminised cheese seeds from greenhouse seeds but only decided to germ 1 incase any major problems occured it wouldnt be a total waste. Conditions = Indoor Tent 80cmx80cm 160cm tall. 400w grolux dual spectrum cooltube about 97 cm from plant top. No extraction fitted yet but will have one next week atm just using a clip on fan pointing at light, pushing air through top of zip flap! Natural intake through bottom vents. Temp Day 24-27 Rating: 5