@Lou Ekus Hello Sir, I have been dosing AFR for my 55g system with success for 2 years. But with my refugium and coral growth, my latest ICP test shows too low levels of several trace elements. I had the idea to add both a- and k+ solutions to my AFR mix in order to have everything under one dosing pump. To calculate i would simply add x doses of each elements bottle where x is the number of daily doses of my AFR container. Can i do that to « boost » the concentration of elements in AFR ? Many thanks !