Kalkwasser

[donkey77]

Gonna start using some Kalkwasser in my 120 mixed reef medium stocked
Going to use the ato method, I have a 5g bin, going with 5 teaspoons of kalk, my tank uses 5g of ro water every3-4 days does anybody see anything wrong with this, I also have a dosing pump but don't know how to convert over, meaning how many ml a day would you dose
Do people still use kalk