i only have 1 light m8, its a 400 watt hps with a grolux bulb. i did germinate first in paper towels do i just put the rockwool in my system then. i bhave a hose outside and the ph seems lower at 6.2 from there for some reason. ive bought 5 litres of bottled water. i also have 2 buckets of water which has been standing for 2 days. and ofcourse i could boil some water. which wud be best to use untill i get the ro machine? on the side of the bottled water it says the ph is 7.8. of course i can lower. ia it possible to change the water once my ro arrives? ive made a bit of nutrient solution also at 1\4 the strength with the standing water. i have alot of canna aqua vega and flora, i hope these r ok. thanks again.