BTW, there is no such thing as pH shock. Fish cannot read pH. There is however such a thing as osmotic shock, from using water with too great a difference in TDS (total dissolved solids) from the existing water.
When someone starts telling you that pH kills fish directly, that is an excellent hint that they are not as knowledgeable as they claim and are prone to repeating aquarium myths which they have not studied for themselves, and that they do not understand water chemistry and fish physiology very well.
When someone starts telling you that pH kills fish directly, that is an excellent hint that they are not as knowledgeable as they claim and are prone to repeating aquarium myths which they have not studied for themselves, and that they do not understand water chemistry and fish physiology very well.
