you need to keep your res at 5.5 becuase rockwool will naturally rise it. if you still have problems try lowering your ppm and use r.o water. also make sure you get 25% runoff. Once a week you should flush with plain water too. i usually do this while changing out my res. I like to let my res curculate for one day to balance everything out before ph balacing it. later.
budcronicindo Reviewed by budcronicindo 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