My alk is currently at 7. I've been thinking about adding kalk through the ATO increasing it to around 9-11. I have a Tunze Ozmooolator. I now others have ran kalk through the ATO, what are some potential issues that I may run into? I don't know what my calcium or mag is as I don't test for it. I will be adding a test kit for each of those in the coming weeks. pH is 8 and it doesn't fluctuate much from that. I'm sure it drops through the night, but to what, I don't know. I do 3 gallon water changes very staggered. So thoughts on using ATO with kalk would be appreciated. Thanks!