Hi there, i should imagine it would? ive heard of other people use aquarium stuff to do with water.
dose it say on the bottle for lowering ph or highering ph. i use ph up and ph down myself, but if thats all you have to hand then its scrach your head time. i my self should think its ok to lower your ph but to what point i dont know? hopfully it wont lower it too far but 6.5-7 ph is just right for soil.
Hope this is of some help to you, later man