Adjusted pH flush water

[MickFoster]

Can somebody please explain to me why the water used to flush plants has to be pH adjusted? I understand that nutrients are available to the plants at a certain pH level - but I don't understand why plain water has to be pH adjusted if the plant is only drinking water and not taking in nutrients.

Thanks!

 

[loolagigi]

i thought it was to maintain a semi constant ph in medium?

 

[Growdude]

i thought it was to maintain a semi constant ph in medium?

Ive also been told it can shock your plant to have a ph swing over 1 if its all of a sudden.