I dose calcium magnesium and alk buffer (in the form of baking soda) via an automatic dosing pump. I also occasionally use Zeovit Coral Snow, Zeovit Coral Vitalizer and I just started trying out some of the brightwell aquatics stuff KoralKolor and Microbacter. For the most part I'm pretty fickle when it comes to those types of additives, mostly because I'm lazy and forget to dose them
