light (hps 400 w) is 15 inches from plants - got a fan working the heat
feeding nutes once a week
temp 22 degrees celsius
.. but i think i figured it out .. its the ph, its to low - I look at the bottle which contains the liquid used to balance the water - and it says ph 5.5 on the label!! i held that bottle in my hand almost everyday for the last two months - and I did not notice until now! what a waster - anyway - ran to the shop - got baking soda..
gonna try that
on the whole - the plants do look rather healty..