I have been using brs 2 part for my mixed reef dosing approx 100ml of alk n calc a day. I was coming due to buy more and have been researching the possibility of a calcium reactor. My main question is about how much media would u guess I would use and how long would a 5 lb bottle last. It is currently a 90 gallon but looking to upgrade to 150-200 which reactor would you suggest?

