I am re-entering the reef aquarium word after a 25-year absence, man things have changed with technology. I recently set-up my Red Sea aquarium with a Neptune Apex System with DOS and DDR for alkalinity and calcium control. I started with Aqua Vitro (Seachem) 8.4 for alkalinity and it has been working well. It is expensive at $43/liter. I was recommended using Seachem Reef Builder to maintain alkalinity (KH). It is a powder and was hoping someone had a recipe to make it by the liter or any volume that I can calculate. Would like to still use DOS to maintain levels. Is this a good idea? Will the powder stay in solution of RO water? Just looking for a less expensive alternative.


