yup , yes sirree i did , spectrum control baby is the way to go for the serious growers. i bought my hlg for the reason that 1 dial is a lot harder to eff up than the total spectrum controls of ChilLED products .for my grows i figured one thing out for sure is that i wasn't gonna waste my hard earned pesos on buying/trying multiple mid/lower lights. right to top o' da heap i went.
what i'd likely do if i were in your shoes would be 1st off , borrow or buy another ph pen , 2nd use it to get my ph'd water to 6.5 and dump a whole bunch lotsa water thru til i got the runoff to around 7.0 ish. i'd also do it right away before i'd overstress her into herming . good luck !