Help with high PH

Just did a 10% water change, checked water params of my replacement water and the ph, gh, kh were a match. I replaced the removed water one cup at a time over a 24 hr period and just tested the parameters again. GH & KH are still a match, but PH jumped from 7.4 to almost 8!

I used ro water with shrimp mineral gh/kh+.

For reference these are my params

GH 7

KH 4

PH 8

I have my first berried shrimp in the tank so I’m really hoping I didn’t mess up. I only did a water change because I had three deaths within 24 hours. 

Side note - I already have 3 almond leaves in my tank