Quick question Ph Up PH Down

ill make this quick and remove it once i find an awnswer. Checked my Ph today and she was at 7, so clearly i have to use Ph Down. Now my question which "PH Down" do i use, i see there are ones for pools, spas, fish tanks ect ect does mine have to be made solely for "soil"? or will any of these work?

Originally Posted by hippy132

Check the PH coming out of container, if you used good solid mix, you will be pleasantly surprised that it is good.IMHO

i use fox farms ocean forest, ive just notice going from natural spring water with no nutes left me at a 6.5 PH then once using nutes the past 3 weeks it has jumped to a striaght 7 ph... so im guessing this is normal then? isnt soil suppose to be at a 6.2 - 6.8?