I'm planning on getting an axolotl in the near future but I'm still struggling with what to do for water treatments. I'm on well water and the pH is 6.0 and KH and GH both non-existent. I would like to use crushed coral in mesh bags but don't know if it would raise those parameters high enough to an axolotls liking. Holtfreter's solution seems like it would solve this problem but not as easy as crushed coral. Suggestions?