Hi everyone, I have a question about raising ph levels in water, I did my ph reading after adding in my flowering nutrients into water (5litres) and when I tested ph it was 5.5 I know it should be at about 6-6.7 in soil (please correct me if I'm wrong) So how do I NATURALLY/ORGANICALLY raise the ph in let's say a 5litre mix of notes? Or is the ph up solution safer and better to use? Plants are in flower and only now am I having ph problems Thanks in advance everyone