Kingfisher

My water comes out of the tap at 8.2-8.3 ph with 37 ppm of tds, low gh and kh. My shrimp do great with just crushed coral and my panda corys don't seem to mind higher ph but I haven't been able to get my ember tetra or pygmy cory colonies to spawn much. Would it be worth trying to lower the ph of my tap water before it goes in? & what would be easiest to use/ how should I add buffer back to the water afterwards?