Unless you are a mad chemist with your nutrients and mix up stuff that is so acidic that it would kill your plant you shouldn't really need PH equalisers. Like #Organoman said feeding your plants is far more important that a slight change in the ph of the water you are adding to your soil. Unforchanantly cellular memory is going to cause this plant to be less bountiful than it would have been if you would have just given the normal feeding and slightly changed the ph of the soil if it would have changed at all. Also, if you are really worried about the PH of soil/nutrients the maybe you should switch to an all organic grow setup.