Also, if you don't want to shell out for a shower filter yet, you might try rinsing with distilled water first. If that helps, then opt for a shower filter.
Originally Posted by Geek_Chic
I forgot about rinsing with distilled water! Before I figured out that coloring was trashing my hair, I started rinsing with distilled water as my final rinse. it helped and I'm not really sure why since we don't have hard water, but it definitely did make a difference.
2C/3A, fine, higher porosity.